Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of FormationMedium2 minQB
ChemistryMediumstatement
Statement 1: Standard enthalpy of isomerization of an enantiomer into the other is zero.
Statement 2: The two enantiomers of any chiral compound have the same enthalpy of formation.
Options:
Answer:
A
Solution:
The enthalpy of isomerization, Δ Hiso, is calculated as the difference between the enthalpy of formation of the product and the reactant:
Δ Hiso = Δ Hf(product) - Δ Hf(reactant)
Enantiomers are mirror images with identical bonding and thermodynamic stability. Therefore, they possess the same enthalpy of formation. This means that the difference in their enthalpies of formation is zero, making Statement 1 correct. Statement 2 provides the exact reason for Statement 1.
The correct answer is (a).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Formation
⏱ 2mℹ️ Source: QB
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