Thermodynamics

JEE Main level, single correct, medium

23 of 190

Question 23 of 190

During the melting of a slab of ice at 273 K at atmospheric pressure :

Show answer and solution

Answer: (D) Positive work is done on the ice-water system by the atmosphere.

Volume decreases during melting of ice so positive work is done on ice water system by atmosphere
Heat absorbed by ice water so ΔQ\Delta \mathrm{Q} is positive, work done by ice water system is negative
Hence by first law of thermodynamics
ΔU=ΔQ+ΔW= Positive \Delta \mathrm{U}=\Delta \mathrm{Q}+\Delta \mathrm{W}=\text { Positive }
So internal energy increases

JEE Main question paper PDF

Open a shift to read the full paper on this page, or download it.

JEE Main 2025 Apr 2 Shift 1 question paper

Open Download PDF

Opening paper…

Explain it as a whiteboard videoStep-by-step, in Hinglish or English. Your first video needs no login.Solved it on paper but got it wrong?Upload a photo of your working. Mistake Doctor marks the exact line that broke.

More Physics practice

JEE Main Physics practice question on Thermodynamics (First Law of Thermodynamics), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.