I can apply this experiment’s concepts to daily life in foods. The majority of chemical reactions that produce heat are combustion reactions. When energy is released, and one gram of a substance is combusted, a fuel value is produced. Fuel values represent heat that is released in a combustion reaction and can be measured by calorimetry. The energy from my body comes from carbohydrates and fats. For instance, glucose, which is a simple sugar, is transported by the blood to the cells and produces carbon dioxide, water, and energy. In addition, the body uses the chemical energy from foods to maintain body temperature and to contract muscles. The body uses proteins, such as eggs and peanut butter, as building materials for skin, hair, and muscle.