Teachers Notes:

Problem 1:
10 C-H, 2 C=C, 2 C-C, 2 C-S, 1 S-S, 1 S=O

Problem 2:

Problem 3:
(10 x 416 kJ/mol) + (2 x 614 kJ/mol) + (2 x 348 kJ/mol) + (2 x 259 kJ/mol) + (1 x 213 kJ/mol) + (1 x 522 kJ/mol) = 7337 kJ/mol

Problem 4:
14 C-H, 3 C=C, 3 C-C, 4 C-S, 1 S-S, 1 S=O

Problem 5:

Problem 6:
(14 x 416 kJ/mol) + (3 x 614 kJ/mol) + (3 x 348 kJ/mol) + (4 x 259 kJ/mol) + (1 x 213 kJ/mol) + (1 x 522 kJ/mol) = 10 481 kJ/mol