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Which of the following is /are correct...

Which of the following is /are correct ?

A

`DeltaH=DeltaU+Delta(PV)` when P and V both changes

B

`DeltaH=DeltaU+PDeltaV` when pressure is constant

C

`DeltaH=DeltaU+VDeltaP` when volume is constant

D

`DeltaH=DeltaV+PDeltaV+VDeltaP` when nP and V both changes

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The correct Answer is:
a,b,c
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