Write balanced thermochemical equations, Hran, and enthalpy diagrams for each of the following reactions, and label them as either exo- or endothermic: 1. Hydrogen and oxygen gas combine to make water. The reaction releases 285.8kJ of energy. 2. Aluminum metal reacts with chlorine gas to form aluminum trichloride. The flask that the reaction takes place in gets extremely hot. The total energy change is measured to be 1408kJ 3. Solid calcium carbide, CaC2, is produced when a piece of calcium oxide combines with pure carbon. Carbon is relatively unreactive and so 462.3kJ of energy are required for the reaction to take place. Carbon monoxide is also produced in the reaction. With a partner, come up with an everyday example of one endothermic and one exothermic reaction: Endothermic