Portions of this entry contributed by David Rovnyak
The first law of thermodynamics is a consequence of conservation of energy and requires that a system may
exchange energy with the surroundings strictly by heat flow or work. Therefore, for change in energy
dE, heat change
For a reversible process in which only expansive work is considered, the first law takes the form
where T is the temperature, dS the entropy change, P the pressure, and dV volume change.
Combined Law of Thermodynamics, Conservation of Energy, Heat, Second Law of Thermodynamics, Thermodynamic Laws, Third Law of Thermodynamics, Work, Zeroth Law of Thermodynamics
