Can an object gain heat without expanding?

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Increasing pressure on a fixed volume of gas results in a temperature increase due to the principles of thermodynamics. When a gas is compressed without allowing it to expand, it heats up as a result of the work done on it. This process can be likened to heating an object and then compressing it back to its original size, which involves forces that raise its temperature. The discussion emphasizes the importance of understanding the relationship between pressure, volume, and temperature in gases. Clarifying terminology around heat and temperature is crucial for accurate scientific communication.
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why?
 
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AgentPancake said:
why?
Why do you think they shouldn't.

P.S. Take a look at this FAQ for a clarification of terminology and why it is wrong to say something "gains heat": https://www.physicsforums.com/showthread.php?t=511174
 
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Welcome to PF!

Hi AgentPancake! Welcome to PF! :smile:

If you put pressure on a fixed volume of gas, won't it heat up? :wink:
 
I think he's talking about heat-expansion and how a body that's not allowed to expand still get hotter.

The trick here is that all objects are at least somewhat compressible. Increasing temperature without allowing to expand is equivalent to heating the object up and then compressing it to original size. (In terms of forces involved.)
 

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