Kinetic theory of gaseous and enthalpy &entropy of gas|| THERMODYNAMICS ...

Kinematic theory of gas : 

              Pressure is produce due to gas molecular collision 
             Average kinetic energy of gas is depend on molecule of gas

             Kinematic energy of gas (K) = 1/2.MV2 = 3/2 kT

Where m is the mass of gas and k is Boltzmann constant , V is velocity of gas molecule and T is the temperature of gas.

Thermal expansion : Material expand due to temperature rise length will also increase 

L = l.t.(apha)

Where alpha is coefficient of thermal  expansion 

Stefan Boltzmann constant : 

first statement : Power is directly proportional to fourth power of absolute temperature 

P =kT4

Second law of thermodynamics : Power is directly proportional to area .

P = kA

So               P =sigma .AT4

    Entropy : It is the property of which show the degree of randomness of gas molecule due to temperature and depend on the  physical state and condition of  system .

S = Q / T 

Enthalpy : It is the property of material which is the sum of total energy of gas molecule it called enthalpy of gas. It is represented by   H.

H = U+ W

Where U is the internal energy of gas and W is the work done 

See below video for more detail


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