ELEMENTS OF CHEMICAL THERMODYNAMICS
Introduction
Thermodynamics is the study of energy and energy changes. Energy
is the capacity to work. It is present in various forms like potential
energy, kinetic energy, light energy, electrical energy etc.
Energy and energy changes are always calculated in terms of heat energy as
there is a natural tendency that all other forms of energy get easily and
finally converted into heat energy.
The branch of thermodynamics dealing with energy changes during chemical
transformation is called chemical thermodynamics.
Types of thermodynamic systems
Homogenous system : A system is homogenous when it has some chemical
composition throughout. e.g. mixture of gases or true solution of solid in
liquid.
Heterogenous system : Two or more different phases which are
homogenous but separated by a boundary. e.g. Ice in water.
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