The first law of thermodynamics states that e=q-w. how is this also a statement of principle of conservation of energy?
a. a change in internal energy causes work to be done and heat to flow into the system.
b. the work that is done by the piston is transformed into heat and change in internal energy.
c. the energy that flows into the system is transformed into head and work.
d. the heat that flows into the system is fransformed into work and a change in internal energy.