In the following reaction, the energy of the reactants is 1240 kj/mol, and the bond energy of the products is 790 kj/mol. What is the total energy of the reaction? Is the reaction enothermic or exothermic?
A 2030 kj/mol, endothermic
B 180 kj/mol, exothermic
C 450 kj/mol, endothermic
D -450 kj/mol, endothermic
dErxb = BEreactants - BEproducts = 1240-790 = 450 kJ/mol
+ is endothermic
- is exothermic