3. Determine the thermal energy released by the combustion of each of the following samples of
hydrocarbons in an open system: 2.344 x 104 g heptane, C7H16(l)

In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)