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My question is clear in the title . Why is the heat capacity at constant pressure different from that at constant volume for the same substance?

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marked as duplicate by Brian Moths, ZeroTheHero, Jon Custer, Floris, sammy gerbil May 16 '17 at 23:19

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    $\begingroup$ Hint: What usually happens to a material when you heat it up? $\endgroup$ – lemon May 16 '17 at 16:24
  • $\begingroup$ A Clear answer is given at en.wikipedia.org/wiki/Heat_capacity $\endgroup$ – user154420 May 16 '17 at 16:38

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