Internal Energy of Ideal Gas – Rankers Physics

Thermodynamics: Practice Problem & Solution

Assertion (A): There is no change in internal energy for ideal gas at constant temperature. Reason (R): Internal energy of an ideal gas is a function of temperature only.  
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:

For an ideal gas, internal energy \(U\) depends solely on temperature \(T\). Therefore, if \(T\) is constant, \(Delta U = 0\). Reason (R) correctly explains Assertion (A).

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