-Why heat and work are not state functions?
-What is the main difference between energy transfer by heat or
by work?
-What is a heat engine?
-Why a heat engine needs at least two heat-sources at different
temperatures?
-Why the irreversible processes are lowering the efficiency of
the heat-engines?
-Name the sources of irreversibility in a heat engine.
-What is a refrigerator? How we define the coefficient of
performance of the refrigerators?
-What is a heat pump? How
we define the coefficient of performance of a heat-pump?
-What is a Carnot cycle? What is the efficiency of a reversible
heat engine working with a Carnot cycle?
-Formulate the second law of thermodynamics with the results we
got on heat engines.
-Why we use different “d” / “δ” signes when we speak about small quantities of internal
energy or heat, respectively?
-Give us some example of reversible and irreversible work.