−68.6 kJ/mol-68.6 \mathrm{~kJ} / \mathrm{mol}−68.6 kJ/mol
−58.03 kJ/mol-58.03 \mathrm{~kJ} / \mathrm{mol}−58.03 kJ/mol
−57.34 kJ/mol-57.34 \mathrm{~kJ} / \mathrm{mol}−57.34 kJ/mol
−55.22 kJ/mol-55.22 \mathrm{~kJ} / \mathrm{mol}−55.22 kJ/mol