Question

Find the change in internal energy of the system in which 1200 calories is removed from a gas held at constant volume (give your answer in kilojoules)

Answer 1

volume is constant hence Δw=0

therefore ΔQ=ΔU

ΔQ= 1200 x 4.2 x j
ΔQ=5040j

ΔU=5.040 kj

if i m not wrong