When do real gasses behave ideally?

Answer 1

Under standard temperature and pressure, which would be 100 kPa (1.0 bar) and 273.15 K (0 oC). This is not correct. The answer is at high temperature and low pressure, according to my college prof.

Answer 2

There are two assumptions that you make when you say that a gas acts ideally: 1. The molecules have no intermolecular forces, so when they collide they do not stick at all (they have purely elastic collisions) 2. The molecules have no volume, so the space they have to move around in is equal to the volume of the container. In reality: 1. Molecules DO have intermolecular forces, so when they collide they lose energy overcoming the intermolecular forces. This means that there next collisions with the wall will be less forceful because they are moving slower and so the pressure they exert is lower. 2. Molecules DO have volume, and so if you have a lot of molecules and a small space, the pressure turns out to be higher because there is less volume for them to move around in and they impact the walls more frequently. So the following are all ways to make a real gas look ideal: 1. Pick a gas that is small and has really weak intermolecular forces. Helium is a perfect example---really small atom and extremely weak dispersion forces between helium atoms. 2. Make the volume of the container really big. This minimizes the amount of volume lost to the volume of the particles. It also spreads the molecules out so that the number of gas particle collisions decreases, minimizing the effect of intermolecular forces. 3. Crank the temperature way up. This does not help with the volume problem, but with a lot of kinetic energy you will hardly notice the molecules attracting each other because the potential energy of the attraction is so small compared to the molecules' kinetic energies.

Answer 3

Noble or inert gases like helium, argon, neon, and xenon behave most like an ideal gas.

Answer 4

Answer is as the pressure is lowered and or the temperature is increased almost all gases show close agreement with the ideal gas equation

Answer 5

When high temperatures and low pressure are used.

Answer 6

Yes...at 1 atmosphere pressure and70 degrees F.

Answer 7

at high pressure and low temperature.

Answer 8

At higher temperatures and lower pressure

Answer 9

When its the same numbers being added