Question

Calculate the enthalpy of formation of benzene. The standard enthalpy of combustion of

benzene is -3266 KJ and standard enthalpies of formation of CO2 (g) and H2O(l) are -393.1 and -

286.0 KJ respectively.​

Answer 1

Answer:

PLAN A CH (Standard heat of combustion) is the standard enthalpy change when one mole of the substance is completely oxidised.

Also standard heat of formation (A fH) can be taken as the standard of that substance

H

∘

C

O

2

=

Δ

f

H

∘

(

C

O

2

)

=

−

400

k

J

m

o

I

−

1