Can a Gas Remain the Same Temp When Compressed?

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SUMMARY

The discussion centers on the behavior of gases during compression, specifically addressing the misconception that a gas's temperature always increases when compressed. The key point is that if a gas is compressed adiabatically, its temperature rises; however, if the compression occurs infinitely slowly, the gas can equilibrate with the surrounding temperature, resulting in no temperature increase. This distinction is crucial for understanding gas behavior in thermodynamics.

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So today I came across this question:
2) CHEMISTRY Multiple Choice Which of the following statements is NOT true:

W) an ideal gas cannot undergo condensation
X) the less mass a particle has, the faster it will effuse
Y) when a gas is compressed, its temperature always increases
Z) a gas is easier to compress than a liquid

ANSWER: Y) WHEN A GAS IS COMPRESSED, ITS TEMPERATURE ALWAYS INCREASES

I just can't think of a case where this would be false. Is it possible for a gas to remain the same temperature or even cool when it is compressed?
 
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It depends on whether you compress the gas adiabatically or not. If you compress it infinitely slowly is will equilibrate with the outside temperature and its temperature will not increase.
 

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