Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of ReactionEasy2 minQB
ChemistryEasysingle choice
The molar enthalpy of vaporization of carbon tetrachloride at its boiling point (350 K) is 7.0 kcal/mol. The molar internal energy change of vaporization is (R = 2 cal/K-mol)
Options:
Answer:
B
Solution:
ΔU = ΔH - Δng RT, Δng = 1. Δng RT = 2 × 10-3 × 350 = 0.70 kcal. ΔU = 7.0 - 0.70 = 6.3 kcal/mol. This is option (b).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Reaction
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