Pick out the correct statement.

Question

Options:

A . If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container, the temperature of the liquid will increase

B . A process is irreversible as long as Δ S for the system is greater than zero

C . The mechanical work done by a system is always equal to ∫P.dV

D . The heat of formation of a compound is defined as the heat of reaction leading to the formation of the compound from its reactants

Answer: Option D

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