Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of FormationHard2 minQB
ChemistryHardmultiple choice
For which of the following substance(s), the standard enthalpy of formation is/are zero?
Options:(select one or more)
Answer:
A, D
Solution:
Δf H° = 0 only for the standard reference state of the element at 298 K: N2(g) for nitrogen and rhombic sulfur for sulfur. Diamond is not the reference form of carbon (graphite is), and the reference state of bromine is Br2(l), not Br2(g). Ans: (a),(d).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Formation
⏱ 2mℹ️ Source: QB
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