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NEET-UG and JEE Main Chemistry · Class 11

Enthalpy, heat capacity and their measurement — NEET & JEE Questions

Enthalpy, heat capacity and their measurement is a topic in Chemical Thermodynamics, a Class 11 Chemistry chapter of the NEET-UG and JEE Main syllabus. TestBudy holds 12 published NEET-UG and JEE Main questions on Enthalpy, heat capacity and their measurement, each with the marking scheme of the real paper.

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Enthalpy, heat capacity and their measurement MCQs with solutions

10 of the 12 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.

  1. Question 1 · difficulty L1 · recall

    At constant pressure, the heat exchanged by a system is equal to its change in

    • A. enthalpy
    • B. entropy only
    • C. volume only
    • D. mass

  2. Question 2 · difficulty L2 · understanding

    Heat capacity is defined as

    • A. heat required to raise the temperature of a body by one kelvin
    • B. heat required to melt one mole
    • C. enthalpy divided by pressure
    • D. mass divided by temperature

  3. Question 3 · difficulty L2 · understanding

    Specific heat capacity refers to the heat required to raise the temperature of

    • A. unit mass of a substance by one kelvin
    • B. one mole by one kelvin only
    • C. any mass by 100 K
    • D. one litre regardless of density

  4. Question 4 · difficulty L2 · understanding

    A calorimeter is used primarily to measure

    • A. heat changes from observed temperature changes
    • B. atomic number
    • C. vapour pressure only
    • D. electrical charge only

  5. Question 5 · difficulty L3 · application

    How much heat is required to raise 100 g of water by 10 K if c=4.18 J g−1K−1c=4.18\,\text{J g}^{-1}\text{K}^{-1}?

    • A. 418 J
    • B. 4180 J
    • C. 41.8 J
    • D. 41800 J

  6. Question 6 · difficulty L3 · application

    A body absorbs 600 J and its temperature rises by 20 K. What is its heat capacity?

    • A. 20 J K−1^{-1}
    • B. 30 J K−1^{-1}
    • C. 600 J K−1^{-1}
    • D. 12000 J K−1^{-1}

  7. Question 7 · difficulty L3 · application

    A reaction performed at constant pressure releases 50 kJ of heat to the surroundings. What is ΔH\Delta H for the system?

    • A. −50-50 kJ
    • B. +50+50 kJ
    • C. 0 kJ
    • D. +100+100 kJ

  8. Question 8 · difficulty L3 · application

    A 200 g metal sample with specific heat 0.50 J g−1K−10.50\,\text{J g}^{-1}\text{K}^{-1} cools by 30 K. What is the magnitude of heat released?

    • A. 300 J
    • B. 3000 J
    • C. 6000 J
    • D. 12000 J

  9. Question 9 · difficulty L4 · application

    A calorimeter of heat capacity 200 J K−1^{-1} shows a temperature rise of 5 K during a reaction. Neglecting other heat losses, how much heat did the reaction release?

    • A. 200 J
    • B. 400 J
    • C. 1000 J
    • D. 5000 J

  10. Question 10 · difficulty L4 · application

    In a coffee-cup calorimeter at constant pressure, the solution absorbs 2.5 kJ from the reaction. What is the reaction enthalpy change for the amount reacted?

    • A. −2.5-2.5 kJ
    • B. +2.5+2.5 kJ
    • C. 0
    • D. Cannot be related to enthalpy

Common mistakes in Enthalpy, heat capacity and their measurement

Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.

  • Confuses heat capacity with specific heat capacity, which is intensive.
  • Uses the initial temperature difference between the samples instead of each sample's actual temperature change to equilibrium.

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