17
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Accepted
Can a stoichiometric mixture of oxygen and methane exist as a liquid at standard pressure and some (low) temperature?
There's a NASA report that looks into this: "ON THE SOLUBILITIES AND RATES OF SOLUTION OF GASES IN LIQUID METHANE", Hibbard and Evans, 1968 and concludes that such mixtures are possible.
Starting on ...
- 559
17
votes
Accepted
Strong exothermic mixing of two 'safe' liquids
If you need a quick source of moderate heat, why not use a single liquid? Sodium acetate trihydrate ($\ce{CH3COONa·3H2O}$), for example, releases heat energy on crystallization... and it takes very ...
- 35.3k
16
votes
Accepted
Is it possible for a compound to be soluble in a mixture of solvents but not the individual solvents?
The short answer is: yes, this is possible. Unfortunately, solubility is a fairly complex phenomenon to explain simply. Let's start with some examples where solubility is higher in a binary mixture ...
- 3,090
16
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Is it possible to boil a liquid by just mixing many immiscible liquids together?
Yes they will boil all right. Sure, there might be some kinetic impediment to it if you let the liquids to settle in layers, but if you stir them so as to expose their surfaces, they will boil†....
- 31.6k
16
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Accepted
Why would there be a non-zero Gibbs energy of mixing for ideal gases?
When we talk about mixing, we usually mean that two components are in different parts of a container before mixing and then they share the entire container after mixing. In other words, the total ...
- 42.3k
12
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Can a stoichiometric mixture of oxygen and methane exist as a liquid at standard pressure and some (low) temperature?
To add to the Bob's excellent answer (and expand a bit on my comment there), I've found two other potentially interesting papers to peruse.
The first is R.J. Hodges and R.J. Burch, Cryogenics 7 112-...
- 8,691
11
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Un-denaturing industrial alcohol
In Soviet Russia, where alcoholism was widespread and homebrewing illegal, undenaturing alcohol was a pretty common thing - a part of national culture, in a way - along with such practices as:
...
- 31.6k
11
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Is the density of a two-component mixture always between the densities of its individual components?
No, there is no law that requires the density of a mixture to fall between the densities of pure components. It does so most of the time, but the exceptions are not unheard of. Here's one.
Water: ...
- 31.6k
11
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Does stoichiometric gas mixture produce the highest explosion pressure (or energy) compared with other explosive limit mixture?
Yes, the stoichiometric mixture is the most energetic and creates the highest pressure.
If the mix is not stoichiometric, then some of the energy of the explosion goes into heating up and expanding ...
- 22.6k
10
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Why would there be a non-zero Gibbs energy of mixing for ideal gases?
With your reply you seem to have answered part of your question. I would like to add a bit about the other part. I will have to do it mathematically first, there is no other shortcut, but then we will ...
- 3,759
9
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Why does Coca-Cola Zero Sugar Contain Sodium Despite no Sodium Ingredients?
Two sources: water and natural flavors
According to the Wisconsin department of healt natural sodium levels in water is $\pu{40-60 mg/L}$ meaning a $\pu{20 fl oz (\! 591 mL)}$ Coke has about $\pu{25 ...
- 12.7k
9
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Why is glass a mixture and not a solution?
[OP] Is there any difference in homogeneous mixture and solution?
According to an intro-college textbook, there is no difference: "A homogeneous mixture, also called a solution, exhibits a ...
- 42.3k
8
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Is it possible to boil a liquid by just mixing many immiscible liquids together?
Nothing special would happen, immiscible liquids would just form layers. As for the expression, $$p_T=\Sigma p^o_i$$
I suggest you read this answer. Quoting Ivan Neretin:
This is not just some vapor ...
- 2,925
8
votes
Accepted
What is the entropy of mixing a gas into the whole atmosphere?
Performing an actual calculation could be quite complicated, even if we use the ideal gas approximation, because the atmosphere has enormous variations in both temperature and density.
To simplify ...
- 12.3k
8
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Does stoichiometric gas mixture produce the highest explosion pressure (or energy) compared with other explosive limit mixture?
No, slightly rich mixtures of propane and air have the highest explosive pressure as reported in DEFLAGRATION PARAMETERS OF PROPANE–AIR MIXTURES IN A CLOSED CYLINDRICAL VESSEL U.P.B. Sci. Bull., ...
- 41k
8
votes
Accepted
What is 'spray foam' or 'expanding foam'?
Single component spray foams work differently to two-component spray foams
The Wikipedia article on spray foams is somewhat misleading because it mostly talks about the characteristics of industrial ...
- 37.8k
7
votes
Explain volume contraction in mixtures of alcohol and water
Liquid water can be thought of as having an average configuration that tends to be an open, almost crystalline structure, somewhat like that for hexagonal ice crystals $\mathrm{^{[1,2,3]}}$. This ...
- 17.7k
7
votes
Which is the suitable process for ball milling?
Wet ball milling is much more effective due to Rehbinder effect producing a disjoining pressure. Adsorption layers from surfactants that arise in microcracks significantly reduce the energy ...
- 38.5k
7
votes
Is it possible to boil a liquid by just mixing many immiscible liquids together?
Is it possible to boil a liquid by just mixing many immiscible liquids together?
No*, boiling is when the vapor pressure of a phase is greater than the ambient pressure. You might create a total ...
- 12.7k
7
votes
A solution is cloudy at lower concentration and becomes clear at higher concentration. Why?
At very dilute concentrations, the solvating power of water overcomes the natural tendency of surfactant molecules to agglomerate into a separate phase. The shear numerical excess of water molecules ...
- 14.3k
7
votes
Accepted
Name of particles in a suspension
“Solid particles” is arguably the better term on its own, especially when size distribution is provided alongside with it.
Alternatively, there is “dispersed phase” and its synonym “discontinuous ...
- 38.5k
6
votes
What forms the emulsion in chocolate?
Chocolate consists of tiny clumps of cocoa solids, sugar, and milk solids dispersed in cocoa butter. Because the solids aren't soluble in the butter, they tend to clump up, which reduces the quality ...
- 1,703
6
votes
Accepted
How to separate two liquids with both having the same properties?
Typical vegetable oils are not just one chemical compound, but a mixture (after removing everything that is not) of glyceride triesters. The chance that there is some overlap between your two oils is ...
- 12.3k
6
votes
What is the entropy of mixing a gas into the whole atmosphere?
To compute the entropy change, assuming the process is isothermal, you need to know the initial volume of the gas, in addition to the approximate final volume. The entropy of mixing in this case is ...
- 22.9k
6
votes
Accepted
Mission: Impossible? Hydrocarbons in an aqueous liquid (e.g. humulene in beer)
There are many industrial problems similar where one would like to incorporate a hydrophobic ingredient into a hydrophilic matrix (or vice versa).
Luckily there are a few main strategies that can be ...
- 216
6
votes
More minerals in seawater at greater depths?
There are huge differences in water composition (and temperature) where there are undersea feature such as hydrothermal vents. The heat and particulates can be "detected as far as tens to ...
- 35.3k
6
votes
Is milkshake a heterogeneous mixture?
Yes, a milkshake is heterogeneous.
milk is heterogeneous all on its own; fat globules in the milk are a different phase than water solutions in the milk. (Curds vs. whey).
ice cream adds two ...
- 22.6k
5
votes
Accepted
Why is water considered a pure substance instead of a mixture?
A mixture is when two or more substances combine physically together.
However, in water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties ...
- 5,059
5
votes
Accepted
Will water allow salts to be dissolved in methanol (that are otherwise poorly soluble)?
This is a highly complicated question, and the answer can't be derived by logic alone.
Maybe the liquid phase will remain mixed, and just dissolve some salt (more than would dissolve in methanol, but ...
- 31.6k
5
votes
How does dimethylsulfoxide serve as a cryoprotectant?
I know this is old but I wanted to provide some additional information in case anyone is using this as an information source. The role in terms of lowering melting temp./preventing ice crystal ...
- 51
Only top scored, non community-wiki answers of a minimum length are eligible