![]() ![]() Furthermore, the initial cost of a heat pump is greater than that of many furnaces, so that a heat pump must last longer for its cost to be recovered. You will need to implement a similar method to calculate enthalpy of reaction as Hesss Law, but. Heat transfer occurs from a cold reservoir\boldsymbolis usually supplied by electrical energy that costs more per joule than heat transfer by burning fuels like natural gas. To learn more about bond enthalpies, check out this article. We say backward, rather than reverse, because except for Carnot engines, all heat engines, though they can be run backward, cannot truly be reversed. Heat pumps, air conditioners, and refrigerators utilize heat transfer from cold to hot. Most people don’t realize they are also sharing their homes with a heat pump. Almost every home contains a refrigerator.
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