According to the first law of thermodynamics, which of the following statements is true about the change in internal energy of a gas in any process? a. It is equal to the input heat minus the work done by the gas. b. It is equal to the input heat minus the work done on the gas. c. It is equal to the work done on the gas minus the input heat. d. It is equal to the change in temperature plus the waste heat.

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First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.