Questions tagged [liquids]
For questions about matter in the liquid phase, or about the concept of the liquid state of matter itself.
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How to decrease the fat blur texture of liquid shoe shine?
I am doing work on liquid shoe shine and using a good emulsifier.
At certain temperature it becomes hard or fat texture and sometime it do not cones to one phase.
How can I make it more in a water or ...
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0
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48
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Non toxic/hazardous liquid or additive that freezes between 5-15 degrees Celsius
I have a product to help regulate core temperature and I have gone the wrong direction at first. Thought of freezing liquid colder would last longer, but it ends up that you need more Jules to move ...
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1
answer
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Liquification of ideal solution of two liquids from vapor phase [closed]
A and B form an ideal solution. In a cylinder piston arrangement, $\pu{2.0 mol}$ of vapor of liquid A and $\pu{3 mol}$ of vapor of liquid B are taken at $\pu{300 torr}$ and $T~\pu{K}$. At what ...
6
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1
answer
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Paramagnetic liquids at room temperature
So as most inorganic liquids are diamagnetic at room temperature (like water), what are some applications to paramagnetic liquids at room temperature?
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3
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Question about vapor pressure in solids and liquids
I've been reading about vapor pressure and it's a bit confusing. For example when water is in equilibrium between the solid and liquid phase, my textbook says that the vapor pressure is equal between ...
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2
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At what temperature is ammonia liquid at 1.5 bars? [closed]
I would like to know at what temperature ammonia condenses from gaseous form into a liquid, at a pressure of 1.5 bars. I know that at normal 1 bar pressure, ammonia is a liquid between -78 and -33 ...
0
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1
answer
68
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Why causes the curvature of the line in pressure-composition graph?
I have been studying about liquid solutions and came across these graphs.
From the first graph it is evident that the solution considered has been assumed ideal as there is no deviation from ideal ...
3
votes
1
answer
158
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Temperature Dependence of Crystal Formation in Storm Glass
The storm glass is an interesting historical device which claims to be able to predict the weather (for example, clear liquid implies fair weather, murky liquid implies rainy weather and large flaky ...
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2
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Why does the vapour pressure not depend on the surface area and volume of a liquid?
My teacher said that vapour pressure is independent of the surface area and volume of a liquid. But I think it should be dependent, because surface area is directly proportional to the evaporation ...
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2
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Chemical potential and condition for equilibrium in case of binary liquid reaction mixture
Suppose there is a liquid mixture with components A and B in equilibrium along with their vapours. Then with the Gibbs-Duhem equation we know that $$μ_A(\mathrm{liquid}) = μ_A(\mathrm{vapor})$$ and
$$...
3
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0
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Colored inorganic liquids: why is SCl2 red, and S2Cl2 orange?
Those do not involve d orbitals, so there is no crystal field theory or ligand theory. Do we have a name of study that only involves p orbitals? Since I think molecular theory is for all s p d f ...
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1
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Is it easier to produce hydrodynamic cavitation in a liquid close to boiling point?
Cavitation is defined as the process of formation of the vapor phase of a liquid when it is subjected to reduced pressures at constant ambient temperature. Thus, it is the process of boiling in a ...
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1
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What is the nature of container when talking about Boiling Point of a Liquid [ Vapour Pressure related ]? [closed]
From what I understand, whenever talking about calculating the value of Vapour Pressure we need to take a closed container as there needs to be an equilibrium established {R evaporation = R ...
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Would it make sense to filter air through oil?
I have seen water-based air purifiers, which work by having air bubble through water supposedly leaving water-soluble molecules behind.
I understand that this concept also humidifies the air due to ...
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1
answer
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Additives to increase water density and solubility [closed]
What additives do I need to add to a water-based drink (coffee or tea for example), to increase its density and to make the drink insoluble (like olive oil for example) in salt sea water or inland ...
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0
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What polyatomic substances have the lowest known freezing points at standard pressure?
At standard pressure, helium never freezes, so that's clearly the coldest liquid—but it's also a monatomic substance.
Diatomic hydrogen freezes at 13 K.
Neon freezes at 24 K.
And then the next coldest ...
0
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2
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445
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Why can't there be a gas-dispersed-in-gas colloid? [closed]
Colloids, a special type of heterogeneous mixtures, typically have two components. One is the dispersed phase (DP), which is the "solute-like" part and another one is the dispersion medium (...
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1
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Can vapor pressure be defined for permanent gases?
Vapor pressure of a substance, in a given temperature, is the pressure exerted the vapor in a system where the gaseous and liquid phases of the pure substance are in equilibrium.
But, if for a ...
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2
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Is it appropriate to say "solid-in-gas solution" and "liquid-in-gas solution"?
A number of books mention "solid-in-gas" and "liquid-in-gas" types of gaseous solutions.
However, for something to dissolve in a gas, it must be in its vapour phase. So, for ...
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1
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What is the ∆H_vap when temperature of a given liquid is equal to the boiling point of the liquid?
What is the $∆H_{vap}$ when temperature of a given liquid is equal to the boiling point of the liquid?
For the other cases ie (i) T>BP, $∆H_{vap}$ > 0 (ii) T<BP, $∆H_{vap}$ < 0
So what ...
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0
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Vapour pressure and boiling [duplicate]
I have come across two definitions for boiling point:
It is the temperature at which a liquid gets vaporised
It is the point where vapour pressure = external pressure
How are they related? How does ...
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1
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Looking for gas or liquid for story research
I am working on a story for adaptation into animation. Main lead is a chemist in a traditional fantasy setting. The chemist uses her own compound to battle using fire or explosions. I love the ...
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2
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Compare density of halogen substituted benzene rings
The correct decreasing order of densities of the following compounds is :
(1) (D) > (C) > (B) > (A)
(2) (C) > (D) > (A) > (B)
(3) (C) > (B) > (A) > (D)
(4) (A) > (B) >...
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A liquid which climbs out of its pot [closed]
My Russian born wife recently asked me to buy her a skin remedy widely used in Russia. In English this is the oil of a plant called Sea Buckthorn. It is a thin yellow liquid. My wife put some of this ...
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3
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0
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Is there a parameter for degree of ‘mixedness’
So I was making coffee this morning and when mixing some milk into the black coffee, I wondered if there was some parameter or value in chemistry which describes how well mixed two liquids (or gases) ...
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1
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Why do polar solvents seem to be of lesser viscosity than non-polar ones? [closed]
For instance, in Russian there is an adjective "oily", which means a liquid of high viscosity. Is this assertion even true in general or statistically?
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2
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Does Raoult's law hold for immiscible liquids?
I know that Raoult's law holds true only for a non volatile solute in a volatile solvent mixture wherein the vapour pressure of the solution gets lowered due to the addition of solute.
Now, first of ...
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1
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How many boiling points does a mixture of liquids have?
Let's say I have a mixture of two miscible liquids. I want to get the liquids by fractional/pure distillation. My textbook says a mixture boils over a range of temperatures. On the contrary, another ...
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Is my bottle of "RooR"-brand glass cleaning liquid pure isopropyl alcohol or something else?
I have this exact bottle: https://www.grasscity.eu/media/catalog/product/cache/2b55fa971a29a7844993ad77b24950ac/i/m/img_3633_1_1.jpg
I originally purchased it to clean my vaporizer (I've since stopped ...
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What is the difference between "vapour" and "gas"?
I have read the definition of vapour on Wikipedia, but I don't seem to have a clear idea about the difference between a vapour and a gas. I know what it means when it says, "gas at a temperature ...
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1
answer
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To calculate total vapour pressure of a solution
Question:
1 mole each of A and B were mixed to obtain an ideal solution of which one mole went to the vapour phase at equilibrium.
If $P°_\mathrm{A} = \pu{100 torr}$ and $P°_\mathrm{B} = \pu{900 torr}$...
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4
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Why does gas not liquify at a temperature above the critical temperature no matter how much pressure is applied on it? Why? [duplicate]
My textbook says that critical temperature is the temperature above which a gas cannot be liquified no matter how much pressure we apply on it. But why? What is so special about this 'critical ...
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1
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Ln2 Dewar Filling [closed]
For cooling of a measurement device (HPGE) i need around 30 Liters of LN2 (Liquid Nitrogen). I'm a hobbyist but, familiar with the basic rules of Ln2 (Eyeshield,Gloves, Ventilation, Pressure Danger) ...
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How much energy is required to liquify oxygen?
Does anyone know where I can find some documentation of a real-world liquification process, and the energy costs?
I can calculate the heat that must be removed from O2 gas to get to liquid, but how ...
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1
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What is inside nanobubbles?
A recent article (ACS Omega 2021, 6, 8021−8027) confirms the stability of nanobubbles with theoretical principles. Nanobubbles, having a size in the range of 50-500 nm, are reported to be metastable, ...
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Cooling down from −78 °C to −88 °C without cryogenics
Say I have a gas cylinder with nitrous oxide and cool it down to −78 °C with dry ice. Is there an endothermic process/reaction that would extract the remaining heat from $\ce{N2O}$ and bring it down ...
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1
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What pressure does liquid nitrous oxide need at −45 °C?
What pressure does liquid nitrous oxide need at −45 °C to remain liquid? How can I calculate its pressure required for other temperatures?
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0
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Why is liquid mercury conductive if you do not have the lattice periodicity to describe the collective behavior of conducting electrons? [duplicate]
We have electric conductivity in metal because the regularity and interaction in a crystal allow for the creation of conduction bands. We should not find these bands in mercury so how could liquid ...
0
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2
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Confusion in barometer experiment
Now at A, there is pressure by mercury column which is nothing but it's weight. Then, at C there is pressure which is atmospheric pressure. Also, the density at A is more than at C. What they say ...
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1
answer
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Energy bands in Liquid [closed]
In solid, energy bands means the 1s orbital with spin up and down become 3 states when there are 3 atoms.
But then. If you look at hydrogen atoms, the allowed bound states have energies equal to En=Ry/...
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Is it possible to have three stable liquid phases in a binary mixture?
With this system, it would be possible to have three liquid phases and two liquid-liquid coexistence regions at various compositions. Similar behaviour is common for solids such as alloys, sometimes ...
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What is intermolecular distance in water? [closed]
I am wondering what is an average intermolecular distance in liquid water (say under normal pressure and room temperature).
I need just order of magnitude. A reference would be helpful.
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1
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How does solutions of two liquids work? [closed]
When two liquids mix, and they are not hindered by a polarity mismatch (like oil and water), why don't they always form a homogenous mixture? Due to entropy, a liquid will disperse itself evenly. This ...
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1
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Low viscosity, low surface tension liquid for volume measurement
General Case
This question concerns the general problem of accurate volume measurement of a given object. Among other techniques, that of liquid displacement is sometimes used for this purpose.
In ...
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1
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I need help finding several immiscible liquids [closed]
I am trying to fill a vial with as many immiscible liquids as possible so that they form many separate layers. I want to do this as a way to visualise how liquids with different refractive indexes ...
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1
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1
answer
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How can CO2 exist in two different phases?
Given a container of $\ce{CO2}$ at a pressure of 100 bar and 295 K, I check the chart below and find:
I'm within the liquid region
I'm before the critical point (304 K)
My question then is, why can ...
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0
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Carbonated Beverage Phenomenon [duplicate]
I've seen this phenomenon a couple of times--I actually saw it happen this night.
When a carbonated beverage is poured into a cup or glass, many tiny bubbles of carbon dioxide form on the bottom of ...
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Finding the reduced pressure to distill a solution containing 0.4 g of naphthalene in 25 g of chloroform at 50 °C
Chloroform boils at $\pu{62 ^\circ C}$. For a solution containing $\pu{0.4 g}$ of naphthalene in $\pu{25 g}$ of chloroform, the boiling point is elevated by $\pu{0.45 K}$, to avoid any decomposition ...
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What are the least dense fluids?
This question left me wondering what other very light (condensed) fluids could exist, at any environmental condition.
Obvious candidates for the list are (at their Bp./1 bar)
LH2 (0.07 g/ml)
LHe (0....
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Is it possible to manipulate some specific atoms of a liquid metal by dint of the magnetic field, electric field, etc?
Let's deem, we have a liquid metal that is multicomponent, for example, type A, B, and C. Is it possible that we single out the type A and put them in a specific shape, for example, a circle?
Let me ...
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