The molar heat of vaporization of n-heptane for the rising T and falling T sets of data was 26.10 kJ/mol . This is the energy required to transform a given amount of n-heptane from a liquid into a gas at a certain pressure. In both table 1 and 2, the vapor pressure was gradually increased as the temperature increased. Also, the vapor pressure was decreased as the temperature decreased. This means that the data values that obtained from this experiment were true values. The isoteniscope method was used to measure the variation of vapor pressure with temperature and determine the molar heat of vaporization of n-heptane.
There are differences between the rising T and falling T sets of data. In the rising T set of data, the temperature was increased
There are differences between the rising T and falling T sets of data. In the rising T set of data, the temperature was increased