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At which one of the following temperature-pressure conditions the deviation of a gas from ideal behavior is expected to be minimum?

1. 350 K and 3 atm
2. 550 K and 1 atm
3. 250 K and 4 atm
4. 450 K and 2 atm

Correct answer: 550 K and 1 atm

Solution

Deviation from ideal gas behavior is minimum at high temperature and low pressure because intermolecular forces and molecular volume become negligible. Among the options, 550 K and 1 atm best satisfy these conditions.

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