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One mole of helium is adiabatically expa...

One mole of helium is adiabatically expanded from its initial state `(P_(i),V_(i),T_(i))` to its final state `(P_(f),V_(f),T_(f))`. The decrease in the internal energy associated with this expansion is equal to

A

`C_(V)(T_(i)-T_(f))`

B

`C_(P)(T_(i)T_(f))`

C

`(1)/(2)(C_(P)+C_(V))(Ti-Tf)`

D

`(C_(p)+C_(V))(T_(i)-T_(f))`

Text Solution

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The correct Answer is:
A
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