How much energy is produced when 5.0 g of butane is burned? 2C4H10(g) + 13O2(g)  8CO2(g) + 10H2O(g) ΔH=-2877.5 kJ/mol

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products