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MHT CET20244 May 2024Evening ShiftChemistryThermodynamics (C)Actual

Which from the following defines enthalpy of a system?

Options

  1. ARatio of pressure to volume
  2. BProduct of pressure and volume
  3. CInternal energy (U) + PV
  4. DInternal energy (U) - PV

Correct answer

C. Internal energy (U) + PV

Step-by-step solution

- (1) Ratio of pressure to volume: This is incorrect. The ratio of pressure to volume is not related to enthalpy. - (2) Product of pressure and volume: This is also incorrect. The product of P and V is part of the enthalpy formula but doesn't define it by itself. - (3) Internal energy (U) + PV: This is the correct definition of enthalpy. Enthalpy is the sum of internal energy and P V . - (4) Internal energy (U) - PV: This is incorrect. Enthalpy involves adding, not subtracting, PV from internal energy.

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