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