A piece of iron at a temperature of 145°C cools off to a temperature of 45.0°C. If the iron has a maşs of 10.0 g and a specific heat of 0.449 J/g.°C, how much heat is given up?

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

Ithink the answer is fusion