Question

What is an ideal gas, and what is the real gas that behaves most ideally?

Answer 1

Answer:

Generally, a gas behaves more like an ideal gas at higher temperature and lower pressure, as the potential energy due to intermolecular forces becomes less significant compared with the particles' kinetic energy, and the size of the molecules becomes less significant compared to the empty space between them.

Answer 2

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What is an ideal gas, and what is the real gas that behaves most ideally?

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Helium gas

• As ideal gas is a theoretical entity that behaves "ideally".
• Helium gas is a real gas that should best fit this ideal.