Skip to main content

# Questions tagged [gas]

This tag is for questions relating to "gas", one of the four fundamental states of matter (the others being solid, liquid, and plasma). Gases follow certain laws known as the gas laws. These laws tell us about the behavior of gases i.e., the values and relations of temperature, pressure and volume etc.

771 questions
Filter by
Sorted by
Tagged with
4 votes
4 answers
8k views

### Do we breathe less oxygen in humid air than dry air?

In rainy season, when air is fully saturated, do we get less oxygen compared to dry air when we breathe, since the volume of breathing remains the same?
0 votes
1 answer
64 views

### $\rm N_2O$ for tire inflation [closed]

I have a car with slightly underinflated tires, and I'm seeking out an overcomplicated solution. Let's get that out of the way first! What's happened is my car started reporting worse fuel economy, ...
1 vote
2 answers
195 views

### Why does the volume of a liquid seem to increase and then rise when you release pressure too fast in a car's cooling system?

So I was pressure testing the cooling system of my car with a kit where you fix a cap, a gauge and a hand pump to the expansion tank and then pressurize the system to 1.5 bars (mostly European cars go ...
1 vote
0 answers
11 views

### Does increasing gas solubility rate reduce the increase of pressure when adding gas to a closed system?

Whilst I have tried to put the question in a generic form in the title, this actually relates to a specific scenario (from the realm of homebrewing, of all places) and I think I should outline that ...
1 vote
2 answers
1k views

### Fermi liquid vs Fermi gas, when to use either one to model a metal?

I had been taught to consider electrons as a Fermi gas in order to calculate properties (like the heat capacity for instance) of metals even near $T=0K$. However I'm now discovering Fermi liquids on ...
5 votes
5 answers
2k views

### What happens to entropy during compression?

I learnt that entropy in the universe can only be created, never destroyed. (And so change in entropy can never be negative, right?) But during compression, don't we increase the order in, say, the ...
65 votes
18 answers
7k views

### If liquid and gas are both chaotic states of matter, what's the difference between them on the molecular level?

I'm a laywoman in physics and recently found myself pondering about the matter reflected in the title of this post. To make my question more precise from the mathematical standpoint, let's suppose ...
6 votes
2 answers
263 views

### Why don't liquid aerosols rapidly vanish by evaporation?

Liquid aerosols are known to be relatively stable. However, given their immense surface area and tiny volume, we would expect them to rapidly vanish by evaporation. Why are liquid aerosols ...
0 votes
2 answers
447 views

### What is the difference in heat transfer between liquid-solid and gas-solid?

As far as I know solids exchange heat energy on contact the best of the three states, due to density and etc. while gasses are worst at that. Recently I found out that, when boiling eggs, it is not ...
0 votes
2 answers
60 views

### How can the ions in intergalactic and interstellar gas held together?

The interstellar and intergalactic medium contain huge amounts of free ions (both free protons and electrons). However, when these particles are not stabilized in an atom because they are excited, as ...
1 vote
2 answers
2k views

### Temperature effect of rising helium balloon in air

I wanna consider some cases and make sure if im right , if i have fixed volume balloon filled with helium , and let balloon fly in air , 1) if air temperature increases , ( without increasing temp of ...
0 votes
2 answers
118 views

### Do gases speed up as they leave the barrel of a gun? If so why?

I am attempting to understand the exact physics behind the recoil in guns. I made an original post on reddit here specifically asking why gases exiting a barrel after the bullet leaves causes a sudden ...
0 votes
1 answer
3k views

0 votes
1 answer
41 views

### Keeping sparkling water inside a bottle as aerated as it was before opening bottle

So when you open a new bottle of sparkling water (or soda) it's very fizzy and aerated. However, when it is stored for quite a bit (no matter how tightly you close the bottle cap) it loses some gases ...