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Calculate the heat of formation of aceti...

Calculate the heat of formation of acetic acid form the following date:
a. `CH_(3)COOH(l) +2O_(2)(g) rarr 2CO_(2)(g) +2H_(2)O(l)DeltaH^(Theta) =- 200.0kcal`
b. `C(s) +O_(2) (g) rarr CO_(2)(g), DeltaH^(Theta) =- 94.0 kcal`
c. `H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH^(Theta) =- 68.0 kcal`

Text Solution

Verified by Experts

To calculate `DeltaH` of the reaction
`2C(s) +2H_(2)(g) +O_(2)(g) rarrCH_(3)COOH(l) DeltaH = ?`
`DeltaH = 2DeltaH_(1) +2DeltaH_(2) -DeltaH_(3)`
`=2 xx (-393.7+2) xx (-285.8) -(-873.2)`
`=- 1359 +873.2`
`=- 485.8 kJ mol^(-1)`
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