Q. When a gas expands adiabatically,

2249 225 Thermodynamics Report Error

A

no energy is required for expansion

B

energy is required and it comes from the wall of the container of the gas

C

internal energy of the gas is used in doing work

D

law of conservation of energy does not hold

Solution:

$Δ Q = 0 = Δ U + Δ W$
$Δ W = - Δ U$