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Thermo literally means heat. Thermodynamics is a branch of physics that has to do with heat and temperature and the relation to energy and work. The behavior of these quantities is governed by the for clause of thermodynamics. Thermodynamics applies to a wide variety of topics in science and engineering especially in physical chemistry, chemical engineering and mechanical engineering. Thermodynamics was initially developed out of a desire to increase the efficiency of early steam engines. Heat Transfer is also referred to as heat. It is the blueprint of thermal energy from one thing to another thing of the different temperature. There are three ways that he can transfer conduction through direct connection, convection through fluid movement, or radiation through electromagnetic waves. In thermodynamics heat means energy that moves between two things when one of them is hotter than the other. Heat is defined as a spontaneous flow of energy or energy in transition from one object to another caused by difference in temperature between the two objects.
The four laws of thermodynamics: 1.) The expression of the principle of conservation energy states that energy can be transformed or changed from one form to another but cannot be created or destroyed. 2.) The second law is an expression of the universal principle of decay observable in nature over time differences in temperature or pressure and chemical potential tend to even out in a physical system that is isolated from the outside world. 3.) The third law as a system approaches absolute zero all processes cease and the entropy of the system approaches a minimum value 4.) the fourth law of thermodynamics refers to any number of various hypothetical statements regarding energy or temperature in nature.