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Substance X Has a Heat of Vaporization of 55

Question 8

Multiple Choice

Substance X has a heat of vaporization of 55.4 kJ/mol at its normal boiling point (423°C) . For the process X(l) → X(g) at 1 atm and 423°C, calculate the value of:
-ΔSuniv


A) 0
B) -79.6 J/K•mol
C) 79.6 J/K•mol
D) -103 J/K•mol
E) 103 J/K•mol

Correct Answer:

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