-
If ∆U and ∆W represent the increase in internal energy and work done by the system respectively in a thermodynamical process, which of the following is true?
-
- ∆U = -∆W in an adiabatic process
- ∆U = ∆W in an isothermal process
- ∆U = ∆W in an adiabatic process
- ∆U = -∆W in an isothermal process
Correct Option: A
By first law of thermodynamics,
∆Q = ∆U - ∆W
In adiabatic process, ∆Q = 0
∴ ∆U = -∆W
In isothermal process, ∆U = 0
∴ ∆Q = ∆W
