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Thermodynamics

# What is correct about the expression -$P \Delta V$?

$\begin {array} {1 1} (A)\;\text{It refers to the work of expansion only} \\ (B)\;\text{It refers to work of contraction only} \\ (C)\;\text{It refers to all type of pressure-volume work} \\ (D)\;\text{None of these} \end {array}$

Ans : (C)
It refers to all type of pressure-volume work