Chemistry - Thermochemistry Question with Solution | TestHub

ChemistryThermochemistryAdiabatic Process/PolytropicMedium2 minPYQ_2020
ChemistryMediumsingle choice

2 moles of solid benzoic acid undergoes combustion at 300 K .
C 6 H 5 COOH s  +  15 2   O 2 g  → 7  CO 2 g  + 3  H 2 O l .
The value ofΔH–ΔUvalue is

Options:

Answer:
B
Solution:

C 6 H 5 COOH s + 15 2 O 2 g →7  CO 2 g +3  H 2 O l
ΔH–ΔU=ΔngRT
=–12(8.314)×3001000
=−1.247 kJ for two moles it is −2.494 kJ

Stream:NTA_ABHYASSubject:ChemistryTopic:ThermochemistrySubtopic:Adiabatic Process/Polytropic
⏱ 2mℹ️ Source: PYQ_2020

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