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The enthalpy changes for the following r...

The enthalpy changes for the following reactions at `298k` and `1atm` are given below:
a. `CH_(3)COOH(l)+2O_(2)(g) rarr 2CO_(2)(g) +2H_(2)O(l),DeltaH =- 874 kJ`
b. `CH_(3)CH_(2)OH(l)+3O_(2)(g)rarr 2CO_(2)(g)+3H_(2)O(l),DeltaH =- 1363 kJ`
Calculate the internal enegry changes for these recaitons.

Text Solution

Verified by Experts

a. `DeltaH = DeltaU +Deltan_(g)RT`
`-847 kJ =DeltaU +0 xx RT :. DeltaU =- 874 kJ`
b. `DeltaH = DeltaU +Delta_(g)RT`
`- 1363 = DeltaU - 1 xx 8.314 xx 10^(-3) xx298`,
`DeltaU =- 1360.53 kJ`
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