Question

Thermodynamics and thermochemistry

Answer 1

Thermodynamics-The word thermodynamics comes from the Greek word thermos which means heat and dynamis which means power. Instead of being grouped within the chemistry family, thermodynamics is part of the physics family.

Essentially, thermodynamics is a science which studies the changes in temperature, pressure, and volume on physical systems on the macroscopic scale by analyzing the collective motion of their particles through observation and statistics.

Because heat means energy in transit and dynamics is associated with movement; thermodynamics studies the movement of energy and how energy creates movement. 
Thermochemistry-Thermochemistry is the study of how heat is released or absorbed as a result of chemical reactions. It is concerned with the heat exchange accompanying transformations, such as mixing, phase transitions, chemical reactions, etc., which includes calculations of such quantities as the heat capacity, heat of combustion, heat of formation, etc. Thermochemistry is also a branch of thermodynamics and is utilized by a wide range of scientists and engineers. For example, biochemists use thermochemistry to understand bioenergetics, whereas chemical engineers apply thermochemistry to design manufacturing plants.
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Answer 2

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