Question

Enthalpy change of formation of cyclopropane : +32.2
Enthalpy change of atomisation of graphite : +717
C-H bond energy : 410 H-H energy : 436

Find the bond energy of C-C in cyclopropane

Answer 1

6*C-H

Answer 2

6*410=2460

Answer 3

enthalpy of bonds broken+enthalpy of bond released
2460+(1*C-C)+0=2118
C-C=-342

Answer 4

Ah thanks, how did your paper 1 go?

Answer 5

is my working right

Answer 6

paper 1 is 3 more hours to go iam worried about it

Answer 7

Which variant?

Answer 8

variant 1