3


Calculate the amount of heat produced when 52. 4 g of methane, CH4,


burns in an excess of air, according to the following equation. CH4(g) +


202(g) — CO2(g) + 2H20(1) AH = -890. 2 kJ. A) Is the reaction endothermic


or exothermic? b) Is the energy of the reactants greater than or less than


the products? c) How much heat in kJ is produced in the reaction when


52. 4 g of methane is burned?