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At 300K , the standard enthalpies of for...

At `300K` , the standard enthalpies of formation of `C_(6)H_(5)COOH_((s),CO_(2(g))` and `H_(2)O_((l))` are `-408,-393` and `-286kJ mol^(-1)` respectively. Calculate the heat of combustion of benzoic acid at
`(i)` constant pressure,
`(ii)` constant volume. `(R=8.31J mol^(-1)K^(-1))`

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At 300 K, the standard enthalpies of formation of C_(6)H_(5)COOH(s),CO_(2)(g) and H_(2)O(l) are -408,-393 and -286kJ mol^(-1) respectively. Calculate the heat of combustion of benzoic acid at (i) constant pressure and (ii) constant volume. (R=8.31J" "mol^(-1)K^(-1))

The standard heat of formation of C_6 H_5 COOH (s) CO_2 (g) & H_2 O (1) at 300K are -408, - 393, & -286 Kj mol^-1 respectively. Calculate the heat of Combustion of Benzoic acid.

At 25^(@)C and 1 atm, heat of formation of C_(2)H_(4) (g), CO_(2)(g) and H_(2)O(l) are 52 " kJ mol"^(-1), -394 " kJ mol"^(-1) and -286 " kJ mol"^(-1) respectively. Calculate the heat of combustion of C_(2)H_(4)(g) .

The molar enthalpies of combustion of C_(2)H_(2)(g), C("graphite") and H_(2)(g) are -1300,-394 , and -286 kJ mol^(-1) , respectively. The standard enthalpy of formation of C_(2)H_(2)(g) is

The molar enthalpies of combustion of C_(2)H_(2)(g), C("graphite") and H_(2)(g) are -1300,-394 , and -286 kJ mol^(-1) , respectively. The standard enthalpy of formation of C_(2)H_(2)(g) is

The enthalpies of formation of CO_(2(g)), H_(2)O_((l)) and C_(2)H_(4(g)) are respectively -393.5, -286 and +52.3 kJ mol^(-1) the enthalpy change for the combustion of C_(2)H_(4(g)) is