The equation DU = Tds - PdV is applicable to infinitesimal changes occuring in
A
An open system of constant composition
B
A closed system of constant composition
C
An open system with changes in composition
D
A closed system with changes in composition
Correct Answer: A closed system with changes in composition
The given equation is a fundamental property relation and is valid for every open system with constant composition and for a closed system when no reaction is taking place in the system.