Physical and chemical laws describing the properties and behavior of gases.

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Using combined gas law to calculate the volume of dry hydrogen gas

Pv/t = pv/t is the equation of combined gas law. Say if the volume of wet hydrogen gas is 40.48ml does this equation still work if part of that volume is water vapor. Or in another word, does the ...
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How to calculate the volume of dry hydrogen in magnesium/ HCl reaction [duplicate]

Sorry if this will sound trivial, I am not too sure if the moles of $H_2$ in the equation $Mg(s) + 2HCl(aq)\rightarrow MgCl_2(aq) + H_2$ is that of dry or wet hydrogen. If the $H_2$ refers to wet ...
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27 views

Stoichiometry of Gaseous Reactions

The Question: How many liters of $H_2S$ would be required to react with excess oxygen to produce $12.0$ $L$ of $SO_2$? The reaction yield is $88.5$%. Assume constant temperature and pressure ...
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63 views

How does pressure change reflects in this formula? [closed]

The pressure is missing or I guess is integrated in the adiabatic constant. But I don't know how to even derive the adiabatic constant for a certain gas.
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45 views

Finding Root-Mean-Square of Ne using kinetic energy?

I am not being able to solve the following question: -Find the root-mean-square speed of $\ce{Ne}$ atoms at the temperature at which their kinetic energy is $\mathrm{6.24\ kJ/mol}$. I tried ...
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35 views

How does moles of gas equal volume? According to Avogadro's hypothesis [closed]

Can someone just prove that for me, and specify the unit of volume. I think this is called Avogadro's law or hypothesis. The number of moles is directly proportional to volume. So does it basically ...
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47 views

Proof of kinetic energy equation

Is there a way to prove that $\frac{1}{2} mv^2 $$= \frac{3}{2}RT$ The first one is kinetic energy and the second is the average kinetic energy. Can this be proved by component of velocity.
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A way to rationalize avogadro's hypothesis

How can one rationalize avogadro's hypothesis using the equation of kinetic molecular theory. Did you see anything? I can't
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67 views

Will the propane liquefy?

Consider a 1:1 mix of propane and nitrogen at 60 °F and 75 psi. Will the propane liquefy if pressure is increased to 200 psi? This is a real world question. I am experimenting in the oilfield with a ...
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39 views

Undergrad Kinetic Molecular Theory

Gas A and B are placed together in a sealed container at room temperature and are pressurized to 2.5atm. After a period of time, there is a border between the two gases. Given A has a density ...
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23 views

Significance of Kinetic Velocities?

In the concept of Kinetic Molecular Theory we have rms(root mean square), avg(average) and mp(most probable) velocities. I understand the concept well. But my question is why do we have three ...
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37 views

Which gas is easier to compress, the ideal gas or a real gas?

Since the pressure of a real gas is less than that of the ideal gas and its volume is more than that of ideal gas, I am assuming that the real gas is difficult to compress in comparison to an ideal ...
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40 views

Calculating collision diameter with viscosity, but not having the mass given

I've got a homework question i'm stumped on. The viscosity of the ethylene gas was measured at $99.8*10^{-7} \textrm{ N s m}^{-2}$ at $288 \textrm {K}$. Calculate the collision diameter in ...
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35 views

The Van Der Waals Equation - High T and High $V_m$

This one is for my physical chemistry homework and I'm having trouble finding the answer. At high temperatures the Van Der Waals equation has the form $$P\approx\frac{RT}{V_M-b}$$ What would ...
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18 views

Addition of combined gas law constant

There are two containers connected to each other but separated by a cork. If container(1) has a gas $G_1$ at a volume $V_1$, pressure $P_1$ and temperature $T_1$ and similarly in container(2) there ...
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15 views

How to determine the pressure to output a gas to achieve a particular gas flow rate?

I have a 420-liter (14.9 cubic ft) helium cylinder and a pressure regulator with a gauge supporting up to 160 psi. My requirement is to ensure a flow of 10 to 15 liters / min. How do I determine the ...
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38 views

The relationships between n , T , P , V for a gas?

The symbols : T : temperature // V : volume // P : pressure // n : number of mole what it is clearly known about the relationship between one another is : P is inversely proportional to V ( from ...
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86 views

What is the partial pressure of oxygen in this mixture of oxygen and argon?

A $19.3\:\mathrm{g}$ mixture of oxygen and argon is found to occupy a volume of $16.2\:\mathrm{L}$ when measured at $675.9\:\mathrm{mmHg}$ and $43.4\:\mathrm{^\circ{}C}$. What is the partial ...
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16 views

A 1.00 L gas at 100. °C and 500. torr contains 70.0 % He and 30.0 % Ne by mass. What is the partial pressure of He?

A $1.00~\mathrm{L}$ gas at $100~^\circ\mathrm{C}$ and $500~\mathrm{torr}$ contains $70.0\%~\ce{He}$ and $30.0\%~\ce{Ne}$ by mass. What is the partial pressure of $\ce{He}$? My answer is ...
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32 views

What is the relationship between pressure and stoichiometry ratios

This is the question from the textbook. Ozone O3 can be prepared in the laboratory by passing an electrical discharge through oxygen gas. Assume that an evacuated steel vessel with a volume of 10L ...
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43 views

What are the units for m in the average kinetic energy formula?

For the equation $E_k=\frac{1}{2}mu^2$ what does the $m$ variable represent? I would say mass but the textbook does not say explicitly that it is anything.
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Henry's Law with varying temperature

I am trying to determine what the derived partial pressure would be for CO2 in the global atmosphere from historical inconstant temperatures and CO2 concentrations of the global atmosphere: Is it ...
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78 views

gas: moles and pressure

For example, lets say we have a question where we have to use the ideal gas law and lets say that moles and temperature are constant. Then the gas law can also be written as $$n\mathcal{R}T=PV.$$ ...
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47 views

What is the mass of 1 Liter of ethylene at 2000 bar pressure?

I was wondering the weight of 1 liter of ethylene at 2000 bar and 310 Kelvin? I have tried to just multiply the weight at 1 bar with 2000 but I don't think i got the correct answer because the answer ...
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21 views

Does Le Chatelier's principle apply to the gas inside an air mattress?

While sleeping on an air mattress yesterday a thought occurred to me. I had to re-inflate the air mattress since it was getting rather low and after it had a good stiffness to it, I went to sleep. The ...
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26 views

Why can air accommodate more water when the air has a higher temperature?

The amount of water(g) that air can accommodate depends on temperature. The absolute humidity then is defined as the percentage of water to air and decreases when the temperature decreases. The ...
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202 views

How much carbonation is in one liter of commercial fountain coke-cola

From what I understand generally coke is carbonated to roughly 6.2g per liter in bottles and cans, or 3.1 volumes of CO2. I was watching this video because I was curious about how fountain soda ...
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38 views

Validity of Henry's Law for an Oxygen/Bitumen System?

Henry's Law is for a gas dissolved in a liquid and states P = kC where P is the partial pressure of the gas above the solution and C is the concentration of the gas dissolved in the liquid. The k is a ...
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137 views

Can a volume of gas be measured by change in PSI?

I had a visit from an air conditioner repairman who brought with him a tank of refrigerant. He measured the system and determined that the pressure was about 20 psi too low. So he added refrigerant to ...
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62 views

Please teach me how to solve this change in concentration over time problem

I've been going crazy with this question for the past 4 hours. I can't find much help in google cause it's not a traditional "find the velocity of the reaction" question. It's fine if you don't give ...
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142 views

What is Inversion Temperature in terms of Joule Thomson Effect? Does Critical Temperature depend upon Inversion Temperature?

I couldn't find a clear answer in my book and on the internet. Please help! Your quick response will be appreciated.
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42 views

Internal and external pressure during a gas expansion

There is a solid substance in a rigid cylinder with a piston placed on top such that the distance between the piston and the bottom of the cylinder is essentially zero, and then the substance ...
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50 views

Ideal gas law? implied volume?

Working on a practice exam. The question is ...
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158 views

How much Carbon Dioxide would be required to displace enough oxygen to prevent ignition?

In air, how much $\ce{CO2}$ would be required to prevent a match to light or a butane lighter to work? I have a basement office that is unusable because of an apparent lack of Oxygen, currently it ...
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Plotting a calibration curve for Gas-Liquid Chromatography

Textbook solution: Why aren't the points like this: $(20,5) (40,10) (60,15) (a,7)$ then to plot the curve we use $y=mx+c$ and then find the value of '$a$'
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274 views

Convert CO₂ ppm volume to ppm weight?

I'm using a sensor that measures $\ce{CO2}$ in ppm by volume aka atmosphere. What I'm using it for is to measure $\ce{CO2}$ concentration in water which is measured in ppm by weight. This is what I ...
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What is the carbon dioxide content of a soda can or bottle?

I sort of know how carbonated beverages are carbonated: a lot of $\ce{CO2}$ gets pushed into the liquid, and the container is sealed. There are at least two things I don't know. First, how much carbon ...
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61 views

How do I calculate the temperature of hot air in Kelvin?

The question simply says "calculate the temperature of hot air in Kelvin" on a data calculation section for this lab. We recorded: volume change on cooling = 170 mL original volume of hot air = 20 ...
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303 views

Boyle's Law of pressure and volume

Boyle's Law states that: Pressure is inversely propotional to Volume. But if we take an example of a balloon. As we fill air in it it's pressure increases but it's volume also increases. Can anyone ...
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59 views

How to do Gas Laws [closed]

A sample of gas in a balloon has an initial temperature of 5 °C and a volume of 1010L . If the temperature changes to 59 °C, and there is no change of pressure or amount of gas, what is the new ...
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201 views

How does the number of moles of gas affect the rate of effusion?

According to Graham's Law, the effusion rate of a gas is inversely proportional to the square root of the molar mass of the gas. However, consider this situation: We have 1 balloon with 1 mole of ...
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42 views

Evaporation velocity of ethanol: adding ethanol vapour to a gas mixture

I need to add a known amount of ethanol vapour to a gas mixture (He/Ar). To do that I let the mixture bubble in liquid ethanol kept at a known temperature (14 C). The system is made of a large steel ...
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135 views

What does negative pressure mean in the context of this manometer?

I have a basic question on a closed manometer: I see that in this case the pressure of gas is lower than that of the liquid, which is why the liquid is higher on the left side. Now, what I don't ...
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88 views

The air we breathe

The air we breathe is a mixture of nitrogen ($\ce{N2}$, 80%), oxygen ($\ce{O2}$, 20% inhaled, 16% exhaled) and carbon dioxide ($\ce{CO2}$, 0% inhaled, 4% exhaled) all of which may be assumed to ...
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44 views

Calculation of molar volume at certain temperatures and pressures

I was wondering are there any calculators/calculations/means of calculation of molar volume at certain temperatures and pressures that don't use the Ideal Gas Law? i.e. The calculation of molar ...
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80 views

Is it possible to use diatomic carbon to utilize a new type of fuel that takes away the waste product of carbon dioxide being released into the air? [closed]

These days, we as a community what to polish and make our world a greener environment. I found a way to accomplish this task, however I don't know if it is applicable. I am wondering if the use of ...
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81 views

Ideal Gas Problem

When I work through the following problem it is unclear to me why 0.00120 mmHg is converted to 0.00332 mmHg. "What is the temperature of 0.00332 g of Hg in the gas phase with pressure of 0.00120 ...
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207 views

Is there a hydrophobic gas?

I am looking into the subject of water repelling and have been led to the hydrophobic subject area. I have two questions regarding this subject. Is there a hydrophobic gas ? If a hydrophobic ...
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83 views

Thermodynamics Problems!

A cylinder, 0.5m long and of cross section S, closed at each end is fitted with a smooth thermally insulating piston, so as to contain gas in each end A and B. Initially, the piston is in equilibrium ...
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66 views

Ideal gas derivations

For an ideal gas, how can someone obtain this: $$ \bar{V}dP = RdT- P \bar{dV}$$ from which it can de deducted, that for a constant temperature $$ \frac{dP}{\bar{dV}} = -RT $$