Question

Based on the first law of thermodynamics, which of the following is correct?

Options

• For an isothermal process, q = + w

• For an isochoric process, ΔU = – q

• For an adiabatic process, ΔU = – w

• For a cyclic process, q = – w

Answer 1

For a cyclic process, q = – w

Explanation:

ΔU = q + w

for an isothermal process, ΔU = 0, q = – W

for an isochoric process; W = 0, ΔU = q

for an adiabatic process, q = 0, ΔU = W

for a cyclic process, ΔU = 0

q = – w