4 mols of C-H Bonds x 100 kcal/mol = kcals

c-h-bonds

#1

4 mols of C-H Bonds x 100 kcal/mol = kcals

Answer:

1 mol of C-H bond=+413kJ/mol and 1kJ=0.2390Kcal
4 mol of C-H bond=(+413*0.2390)*4=394.828Kcal
hence, 4mols pf C-H bonds * 100 kcal/mol=39482.8 Kcals