Adiabatic Process Work – Rankers Physics

Thermodynamics: Practice Problem & Solution

Assertion (A): In adiabatic process, work done on the system is equal to negative of change in internal energy. Reason (R): In adiabatic process change of heat zero.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Thermodynamics. Understanding the underlying formula is key to arriving at the correct answer below:

In an adiabatic process, the system is perfectly insulated so that no heat exchange occurs \(Q = 0\). According to the First Law of Thermodynamics \(\Delta U = Q - W_{by}\), this means any change in internal energy is due entirely to work: \(\Delta U = -W_{by}\)

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