Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal `K^(-1) mol

Question

Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal `K^(-1) mol

Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal `K^(-1) mol^(-1)`)
A. 54 cal
B. - 600 cal
C. - 300 cal
D. 27 cal

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - C
Given
`T=27^(@)C=300K`
`R=2calK^(-1)mol^(-1)`
Reaction for combustion of carbon monoxide is given as:
`CO(g)+1/2O_(2)(g)toCO_(2)(g)`
`thereforeDeltan_(g)=1-15=-1/2`
Now, the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume is given by
`DeltaH-DeltaU=Deltan_(g)RT`
`thereforeDeltaH-DeltaU=-1/2xx2xx300=-300 cal`