Imagine being able to use your computer to make phone calls with the help of special software and a microphoneâand bypassing your phone company and their charges.
So O2 has zero of heat of formation (or enthalpy of formation). The enthalpy of a reaction is defined like this: H = Hproducts-H reactants. The enthalpy of reaction in this case, is the same as the heat of combustion. Hproducts is obtained summing the heats of formation.
A Matter of Degrees. To run efficiently, your diesel depends on the thermostat to maintain the best temperature. A pellet filled with wax and metal sits in the center of a thermostat. When heated, the pellet expands and pushes open the bottom of the cuplike device, allowing coolant to circulate through the engine.