Learn

Saturday, 31 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 4 August 2021, Shift 1, Physics Q25

Question 25 of 90 in this shift, Physics question 25 of 30, Section B.

1 g of water at 100°C is converted into steam at the same temperature and at 1 atmospheric pressure. The change in internal energy is ________ J. [Consider latent heat of vaporisation is 2256 J/g and 1 atm = 10510^5 Pa] [Volume of water and steam at 1 atm = 1 cm3^3 and 1671 cm3^3 respectively]

Official answer

2089

NTA final key.

Chapter
Thermodynamics
Topic
First Law of Thermodynamics
Idea tested
First Law in Phase Transitions

Same idea in other shifts

Asked 2× in all
  1. 11 Apr 2023, Shift 1 · Q441 kg of water at 100∘100^\circC is converted into steam at 100∘100^\circC by boiling at atmospheric pressure. The volume of water changes from…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.