Chemical Engineering Thermodynamics

Entropy change of the reaction, H₂O(liquid) H₂O(gas), is termed as the enthalpy of

  • A. Solution
  • B. Vaporisation
  • C. Formation
  • D. Formation
Answer: Option B.

A. solid ⟹ liquid → melting
B. liquid ⟹ vapor → vaporization
C. solid ⟹ vapor → sublimation
So, enthalpy change for the reaction H2O(liq)⇒H2O(gas) is enthalpy change of vaporization.
In the question entropy should be replaced by enthalpy.

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