Students will be able to
- recall that the work done by a heat engine is determined by subtracting the heating of its low-temperature reservoir from the cooling of its high-temperature reservoir,
- qualitatively describe efficiencies of heat engines from graphs showing the changes of temperature of the reservoirs of a heat engine with time,
- recall that the equation efficiency = applies to an ideal heat engine for which there is a negligible change of reservoir temperatures,
- use the equation efficiency = in all combinations,
- identify the work done and the heating and cooling occurring during the adiabatic changes and isothermal changes that occur over a Carnot cycle.