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Calculate the value of (DeltaH - DeltaE)...

Calculate the value of `(DeltaH - DeltaE)`in calories for the combustion of `CH_4` at `27^@C`. 

Text Solution

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`CH _(4 (g)) + 2O _(2 (g)) to CO _(2 (g)) + 2H _(2) O _((l))`
Change in the number of moles,
`Deltan n = n _(P) - n _(R) =1 -3 =-2, Delta H = Delta E + Delta n RT`
`Delta H - Delta E =- 2 xx 2 xx 300 =-1200 ` calories.
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