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NEETChemistryThermodynamics (C)

What is the standard enthalpy of sublimation?

Options

  1. AThe heat change when a solid melts at a constant temperature
  2. BThe heat change when a solid vaporizes at a constant temperature
  3. CThe heat change when a solid sublimes at a constant temperature
  4. DThe heat change when a liquid vaporizes at a constant temperature

Correct answer

C. The heat change when a solid sublimes at a constant temperature

Step-by-step solution

The standard enthalpy of sublimation, ∆ sub H, is the heat change when one mole of a solid substance sublimes at a constant temperature and under standard pressure (1 bar).

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