Asked in PMC Practice Test 1 (2021) 2021

At constant volume the heat supplied is equal to:

Correct answer: B. Internal energy change

  • A. Work done
  • B. Internal energy change
  • C. Enthalpy
  • D. Entropy

Explanation

At constant volume, the heat of the reaction is equal to the 'change in the internal energy of the system'.

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About Internal Energy

Internal energy is the total microscopic kinetic and potential energy of a system and is a state function. The first law, ΔU = q + w, connects changes in internal energy with heat and work, including sign conventions, expansion or compression and constant-volume processes.

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