Determination of Enthalpy Content of Pure Metals or Metal Alloys
For example, in order to determine the enthalpy content of the pure metal aluminium at a specified temperature of 500 degrees Celsius, you would have to measure the isobaric specific heat capacities of aluminium at 50 degree Celsius intervals, starting at -200 degree Celsius and going up to 500 degrees Celsius. Through differential analysis of these actual measured values of specific heat capacities of aluminium at constant pressure, formulate a mathematical function that numerically defines the heat content of aluminium as a function of temperature. Through mathematical integration of the values of the mathematical function between the upper limit of 500 degrees Celsius and the lower limit of -200 degrees Celsius with respect to temperature, you determine the area under the non-linear curve or the average value of the heat content of aluminium between the interval of 500 degrees Celsius and -200 degrees Celsius. By multiplying the average specific heat capacity with the value of temperature of 500 degrees Celsius, you determine the enthalpy content of aluminium at a temperature of 500 degrees Celsius.