Can you describe what's QH and QL in the second law of thermodynamics?
Homework Answers
In second law of thermodynamics QHrepresents the magnitude of heat transfer between the cyclic device and high temprature medium (at temperature TH ) . And QL represents magnitude of heat transfer between cyclic device and low temprature medium at temprature TL . Both of these quantities are always positive quantities.
Second law states that " it is impossible to construct an engine which working in a cycle shall produce no effect other than transfer of heat from a colder to hotter body. Hence a net amount of work should be done .and this work is given by :
Wnet out = QH- QLL for a heat engine.
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