Question

109. At 300K the standard enthalpies of formation of
C6H5COOH(s), CO2(g) and H2O(l), are -408, -393
and-286 kJ/mol respectively. Calculate the heat
of combustion of benzoic acid at contant volume :
(1) +3201 kJ
(2) +3199.75 kJ
(3) -3201 kJ
(4) -3199.75 kJ​

Answer 1

109. At 300K the standard enthalpies of formation of

C6H5COOH(s), CO2(g) and H2O(l), are -408, -393

and-286 kJ/mol respectively. Calculate the heat

of combustion of benzoic acid at contant volume :

(1) +3201 kJ

(2) +3199.75 kJ

(3) -3201 kJ✔️✔️✔️

(4) -3199.75 kJ