To determine the energy density of ethanol
Energy density is the energy stored per unit mass. The higher the energy density, the higher the amount of energy that substance is able to store per unit mass (Rodrigue, 2011). In terms of fuel, it is important to determine the energy density. For example, most alternative fuels have a low energy density which means the cost of transporting these fuels to provide the same amount of energy would be higher (Rodrigue, 2011). The standard, accepted measurement of the energy density of ethanol is approximately 28.6 MJ kg-1 (28,600,000 J kg-1) (King, 2009).
The energy density can be found by initially finding the energy which is being transferred from the fuel to the substance receiving the energy by using the equation, , where is the mass , is the specific heat capacity and is the change in temperature. The specific heat capacity of water