The 1st law of thermodynamics
ΔQ=ΔU+W= ΔU+pΔV
For adiabatic process ΔQ=0 =>
0=ΔU+pΔV
if p=const and ΔV ↑ => ΔU ↓
The internal energy ΔU depends on temperature; and temperature decreases as the kinetic energy of particles decreases
1. When an ideal gas is expanded adiabatically in volume at constant pressure, the average kinetic energy of the gas molecule: A. Increase B. decreases C. Does no change
i know the answer is B but can someone explain why please? i thought it does not change since its adiabatically.
1 answer