Question

an increase in moles of gas from the reactants to the products indicates that work is...

an increase in moles of gas from the reactants to the products indicates that work is done...

A. by the sytstem because volume is expanding

B. by the system because volume is contracting

C. on the system because volume is expanding

D. on the system because volume is contracting

having trouble conceptually understanding why the answer is A.

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