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JEE Main Chemical Thermodynamics questions with solutions

Enthalpy, entropy, Gibbs energy, Hess law and calorimetry for chemical systems. 16 questions from our 2016–2025 JEE Main pattern papers, from the Class 11 Chemistry syllabus. Each has the answer and a full solution.

Also practise: Chemical Thermodynamics for JEE Advanced

JEE Main 2025

Enthalpies of combustion at 298 K (products CO2(g) and H2O(l)) are: graphite -393.5, H2(g) -285.8, C2H6(g) -1560 kJ mol^-1. For the formation…JEE Main 2025 · medium

JEE Main 2024

640 g of naphthalene, C10H8(s) (M=128), is burnt completely in a bomb calorimeter whose heat capacity (including contents) is 9.00 kJ K^-1, and the…JEE Main 2024 · medium

JEE Main 2023

JEE Main 2022

JEE Main 2021

JEE Main 2020

JEE Main 2019

For a reaction A → B, Δ H^° = +40 kJ mol^-1 and Δ S^° = +120 J K^-1 mol^-1, both independent of temperature. Taking R = 8.314 J K^-1 mol^-1, the…JEE Main 2019 · easy

JEE Main 2018

JEE Main 2017

JEE Main 2016

The combustion of liquid ethanol, C2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l), in a bomb calorimeter at 300 K gives Δ U=-1364.0 kJ mol^-1. Given ΔfH^°(CO2)=-394…JEE Main 2016 · medium

Other Chemistry topics

Alcohols, Phenols, Ethers and Haloalkanes 16 Atomic Structure 12 Biomolecules and Polymers 14 Carbonyl Compounds, Carboxylic Acids and Amines 25 Chemical Bonding and Molecular Structure 14 Chemical Equilibrium 10 Chemical Kinetics 13 Coordination Compounds 18 Electrochemistry 18 General Organic Chemistry and Isomerism 13 Hydrocarbons 16 Ionic Equilibrium 11 Mole Concept and Stoichiometry 12 Periodic Properties 9 Qualitative and Practical Chemistry 8 Redox Reactions and Titrations 9 Solutions, Solid State and Surface Chemistry 19 d- and f-Block Elements and Metallurgy 14 s-Block, p-Block Elements and Hydrogen 23