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Definition
The word thermodynamics is derived from the Greek words therme, meaning heat and dunamis, meaning power. Thermodynamics is a branch of physics that studies the effects of changes in temperature, pressure, and volume on systems at the macroscopic scale by studying the motion of their particles. A system is the subject of study. Heat means energy in transit and dynamics relates to movement of particles; thus, in essence thermodynamics studies the movement of energy and how energy instills movement. Thermodynamics describes how systems respond to changes in their surroundings. This can be applied to a wide variety of topics in science (physics and chemistry) and engineering, such as engines, phase transitions of matter, chemical reactions, and transportation.
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