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Which of the following is the correct statement of the second law of thermodynamics? | |
A. | It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work. [Wrong Answer] |
B. | It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source. [Wrong Answer] |
C. | There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy. [Wrong Answer] |
D. | all of the above [Correct Answer] |