OnlineCBT
Chemistry · THERMODYNAMICS
हिन्दीGiven below are two statements:\n Statement I: During free expansion of an ideal gas into a vacuum, the work done is maximum.\n Statement II: For isothermal free expansion of an ideal gas, the change in internal energy is zero (\( \Delta U = 0 \)). \nIn the light of the above statements, choose the most appropriate answer from the options given below:
Correct answer · Option 4
Statement I is incorrect but Statement II is correct.
Explanation
In free expansion into a vacuum, \( p_{\text{ex}} = 0 \) so work done is zero (not maximum), making Statement I incorrect. For an ideal gas at constant temperature, \( \Delta U = 0 \), so Statement II is correct.
