Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of ReactionMedium2 minQB
ChemistryMediummatching list
Match the following
Column I | Column II |
|---|---|
P) 2H2O(g) → 2H2(g) + O2(g) | i) ΔH = ΔU + 2RT |
Q) N2(g) + O2(g) → 2NO(g) | ii) ΔH = ΔU |
R) 2SO2(g) + O2(g) → 2SO3(g) | iii) ΔH = ΔU - RT |
S) 2NH3(g) → N2(g) + 3H2(g) | iv) ΔH = ΔU + RT |
(Column I = Reaction; Column II = Relation)
Options:
Answer:
C
Solution:
Use ΔH = ΔU + Δng RT, counting gaseous moles only. P: Δng = 3 - 2 = +1, so ΔH = ΔU + RT, P-iv. Q: Δng = 2 - 2 = 0, so ΔH = ΔU, Q-ii. R: Δng = 2 - 3 = -1, so ΔH = ΔU - RT, R-iii. S: Δng = 4 - 2 = +2, so ΔH = ΔU + 2RT, S-i. Ans: P-iv; Q-ii; R-iii; S-i.
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Reaction
⏱ 2mℹ️ Source: QB
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