The temperature of a swimming pool is maintained at 20-degree Celsius when the outside temperature is 10-degree Celsius. Later the outside temperature has dropped to 5-degree Celsius but the pool temperature is still the same at 20-degree Celsius. Compare the heat energy transferred to the pool in both the cases.

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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.