Question 6 A measure of 0.50 kg of water is placed in a 0.20 kg aluminium tray, both initially at 288 K, and placed in a refrigerator that is kept at 268 K. How long will it take to freeze the water and lower the temperature to 268 K if the maximum rate of removal of heat energy by the refrigerator is 50 W? Specific heat capacity of liquid water = 4.2 x 10 J kg K Specific heat capacity of ice = 2.1 x 10° J kg K Specific heat capacity of aluminium = 800 J kg K Latent heat of fusion of water = 3.4 x 10 J kg %3D

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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.