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Thermodynamics

  • Enthalpy Changes and Reaction Energy Profiles
  • Hess's Law and Thermochemical Calculations
  • Entropy Change in Physical and Chemical Processes
  • Work Done in Reversible Isothermal Expansion of Ideal Gas
  • Isothermal, Isochoric, Isobaric and Adiabatic Processes
  • Enthalpy Change and Internal Energy Change
  • Work Done in Isothermal and Adiabatic Processes
  • Heat Capacity – Relation between Cp and Cv
  • Second Law – Entropy of Irreversible Processes
  • Enthalpy and Entropy Changes
  • Thermodynamic Processes – Free Expansion
  • Work Done in Expansion against Constant Pressure
  • Entropy and Spontaneity
  • First law of thermodynamics
  • Gibbs free energy and spontaneity ($\Delta H$ from $\Delta U$ for gaseous reactions)
  • Free expansion of an ideal gas into vacuum
  • Sign conventions for endothermic and exothermic reactions
  • Bond enthalpy values
  • Relation between enthalpy change and internal energy change
  • Bond enthalpy calculations
  • Gibbs free energy and spontaneity
  • Enthalpy change for decomposition (reverse) reaction
All Exams › NEET Previous Year Questions › Chemistry › Thermodynamics › First law of thermodynamics

First law of thermodynamics

1 Questions
1 Papers Covered
4.55% Weightage
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2026 1 question

  1. At a certain temperature, T (K), during a process, 500 J is absorbed by the system and work of 200 J is done by the system. Then change in internal energy of the system is:
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