The 'energy in' is an endothermic change, as the energy is being used to break bonds. The 'energy out' is an exothermic change, as the energy is released as new bonds are formed. Therefore the energy ...

A 3.5 kg cat climbs a tree. The tree is 5.6 m high. How much gravitational potential energy has the cat gained? (g = 10 N/kg) ...