Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas?
(Assume non-expansion work is zero)

Options

A. Isothermal process : q = −w
B. Isochoric process : `DeltaU = q`
C. Adiabatic process :`DeltaU = −w`
D. Cyclic process : q = −w

Answer

C

Explanation

From FLOT `DeltaU = q + W`
for adiabatic process q = 0
`:. Delta U = w` .