Question

59. No heat flows between the system and surroundings. Then
the thermodynamic process is
(a) isothermal
(b) isochoric
(c) adiabatic
(d) isobaric​

Answer 1

ANSWER -

OPTION C.) ADIABATIC

EXPLANATION ( MORE TO KNOW ABOUT THE RELATED TOPIC) -

A thermodynamic process where no heat is exchanged with the surroundings is called adiabatic process. e.g. expansion of gas in vacuum. Features of adiabatic process:

1. The system is thermally isolated from surroundings.

2. Internal energy varies (ΔU ≠ 0)

3. W = ΔU

Answer 2

Answer:

Option (c) is the correct answer

Explanation :

Because there is no external pressure for the gas to expand against, the work done by or on the system is zero. Since this process does not involve any heat transfer or work, the first law of thermodynamics then implies that the net internal energy change of the system is zero.