This is a branch of physical chemistry, which deals with heat changes between the system and surroundings.
Some Terms Used in Thermodynamics
System β It is the part of the universe, which is taking for thermodynamics studies. It can be open, closed or isolated.
Surroundings β It is all the factors, which are found outside the system.
Boundary β It is what separates the system from the surroundings.
Enthalpy β It is the heat content of a given system. It is represented by ΞH.
Free Energy– It is the energy available for useful work. It is represented by ΞG. ΞG = ΞH – TΞS.
Entropy– It is the degree of randomness or disorderliness of a system. It is represented by ΞS.
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