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Saturday, 31 October

JEE Main · Chemistry · Thermodynamics (Chemistry)

Heat Capacity Relation in Enthalpy

JEE Main asked Heat Capacity Relation in Enthalpy 3 times in 3 of the 108 shifts Lumi analysed, in 2020, 2022 and 2026. It belongs to Enthalpy and Hess's Law, in Thermodynamics (Chemistry) (Chemistry). The longest wait between two years asking it was 4 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2020
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2022 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170.08’200’210.03’220’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20221 of 24
  • 20210 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: conceptual.

  • Statement i/ii on heat capacities of ideal gas
  • Moles from heat capacity and internal energy

Difficulty

Easy 1Medium 2Hard 0

1 of the 3 questions had a numerical answer.

Every question

All 3 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 4 Apr 2026, Shift 1 · Q54Given below are two statements: Statement I: For an ideal gas, heat capacity at constant volume is always greater than the heat capacity…EasyTwo statements
  2. 27 Jul 2022, Shift 1 · Q84The molar heat capacity for an ideal gas at constant pressure is 20.785 J K−1^{-1}mol−1^{-1}. The change in internal energy is 5000 J upon…MediumNumerical value
  3. 4 Sep 2020, Shift 1 · Q29For one mole of an ideal gas, which of these statements must be true ? (a) U and H each depends only on temperature (b) Compressibility…MediumOther

Shifts: 4 Sep 2020, Shift 1, 27 Jul 2022, Shift 1, 4 Apr 2026, Shift 1.

Same topic

Other ideas in Enthalpy and Hess's Law

Enthalpy and Hess's Law has 23 ideas JEE Main has asked; 12 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas