Chemistry Thermodynamics and Thermochemistry NTA Abhiyas Question - (Thermodynamics) Single Correct MCQ
Published on: August 14, 2026

Three samples of 100 g of water (samples I, II and III), initially kept at 1 atm pressure and 298 K were given the following treatments. Sample I was heated to 320 K and cooled to 298 K

Sample II was heated to 300 K, cooled to 273 K and heated to 298 K

Sample III was heated to 373 K and cooled to 298 K

At the end of these processes, the internal energy of

A
III is the highest
B
II is the highest
C
I and III are the same, II is lower than that of I and III
D
I, II and III are the same

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Text Solution

Verified by Experts
The correct answer is:
D

I, II and III are the same

As Internal energy change is a state function so it depends only on the initial and final temperature and does not depends on the path taken.

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