Question

Derive expiration for pressure- volume work
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Answer 1

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Derive expiration for pressure- volume work

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☞During expansion, work is done by the system and ∆V(V2 – V1) is positive. Therefore, in order to satisfy the sign conventions, a negative sign is put in the expression for work. During compression, Work is done on the system.

☞Pressure-volume work

On expansion, the force exerted by a gas is equal to area of the piston multiplied by pressure with which the gas pushes against piston. This pressure is equal in magnitude and opposite in sign to the external atmospheric pressure that opposes the movement and has its value - Pext.

Answer 2

Answer:

Derive an expression for pressure-volume work (PV – work). During expansion, work is done by the system and ∆V(V2 – V1) is positive. Therefore, in order to satisfy the sign conventions, a negative sign is put in the expression for work. During compression, Work is done on the system.

Explanation:

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