A) energy
B) charge
C) heat
D) all of these
Correct Answer: A
Solution :
The first law of thermodynamics states that energy cannot be created or destroyed, rather, the amount of energy lost in a process cannot be greater than the amount of energy gained. This is the statement of conservation of energy for a thermodynamic system. It refers to the two ways that a closed system transfers energy to and from its surroundings by the process of heating (or cooling) and the process of mechanical work. The rate of gain or loss in the stored energy of a system is determined by the rates of these two processes. In open systems, the flow of matter is another energy transfer mechanism, and extra terms must be included in the expression of the first law.
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