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Under what conditions are (i) DeltaU=q(V...

Under what conditions are (i) `DeltaU=q_(V)&` (ii) `DeltaH=q_(P)` ?

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(i) `DeltaU=q_(V),` Conditions: closed system, constant volume, only P-V work is considered (ii) `DeltaH=q_(P),` Conditions: Cosed system, constant pressure, only `P-V` work is considered.
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