Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of FormationMedium2 minQB
ChemistryMediumstatement
Statement 1: The standard enthalpy of formation of Br2(l) is zero.
Statement 2: The standard enthalpy of formation of Hg(l) is zero.
Options:
Answer:
B
Solution:
By convention Δf H° = 0 for an element in its standard reference state at 298 K. Br2(l) is the standard state of bromine and Hg(l) is the standard state of mercury, so both statements are correct. But the zero for mercury is not the reason for the zero of bromine; each follows independently from the same convention, so Statement 2 does not explain Statement 1. Ans: (b).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Formation
⏱ 2mℹ️ Source: QB
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