Physics > First Law of Thermodynamics > 7.0 Heat engine
First Law of Thermodynamics
1.0 Introduction
2.0 Three important terms in first law of thermodynamics.
3.0 First law of thermodynamics
4.0 Different thermodynamic processes
4.1 Isobaric Process:
4.2 Isochoric process
4.3 Isothermal process
4.5 Adiabatic process
4.6 Polytropic process
5.0 Graphs
6.0 Efficiency of cyclic process
7.0 Heat engine
8.0 Refrigerator
7.1 Second Law of Thermodynamics:
4.2 Isochoric process
4.3 Isothermal process
4.5 Adiabatic process
4.6 Polytropic process
Kelvin-planck statement:
"It is impossible to construct an engine which, operating in a cycle, has the sole effect of extracting heat from a reservoir and performing an equivalent amount of work."
Clausius's statement:
According to clausius " It is impossible for a self-acting machine working in a cyclic process, unaided by external agency, to transfer heat from a body at low temperature to a body at high temperature."
In other words it may be ststed as " Heat cannot flow itself from a colder body to a hotter body."
