Mathematical equation of first law of thermodynamics for isochoric process is

Options

A. `DeltaU=q_(V)`
B. `-DeltaU=q_(V)`
C. `q=-W`
D. `DeltaU=W`

Answer

A

Explanation

for an isobaric process,`DeltaV=0`
In this process, the first law of thermodynamics
`q=DeltaU-W`
`q=DeltaU - pDeltaV`
As `DeltaV=0`
`qV=DeltaU`