Question
If ΔU and ΔW represent the increase in internal energy and work done by the system respectively in the thermodynamical process, which of the following is true?
-
ΔU = - ΔW, in a adiabatic process
-
ΔU = ΔW, in an isothermal process
-
ΔU = ΔW, in an adiabatic process
-
ΔU = -ΔW, in an isothermal process
Solution
A.
ΔU = - ΔW, in a adiabatic process
From the law of thermodynamics
ΔQ = ΔU + ΔW
For a adiabatic process ΔQ = 0
ΔU = - ΔW
