Write Mayer’s formula. The molar heat capacities of a gas at constant pressure
and constant volume are 28.8 J mol−1 K−1 and 20.5 J mol−1 K−1 respectively.
Calculate the gas constant.
In the adiabatic process, the adiabatic exponent is
_____ __________ ______ _________ _______ ____ ________ _________ ___ _______ ____ ____.
_________ _________ _____ _______ ___ _______.
______ ___ ____ _______ ___.
______ _________ _______ ___ _____ ________.
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Using the results in (i) and (ii) obtain an expression for viscosity of the gas.
Write the first law of thermodynamics for a gaseous system. Show that the
expression of difference of heat capacities of a gas at constant pressure and at
constant volume is given by
b) 2 kg of water is heated from 0°C to 100°C and converted into steam at the same temperature. Calculate the increase in entropy, given that specific heat of water is
4.18 × 103 J kg−1 K−1 and Latent heat of vaporisation is 2.27 × 107 J kg−1.
Write Mayer’s formula. The molar heat capacities of a gas at constant pressure
and constant volume are 28.8 J mol−1 K−1 and 20.5 J mol−1 K−1 respectively.
Calculate the gas constant.
The average energy of helium molecules is ¯E = 2.89 ×10−21J. Calculate their average speed (¯v).
Represent the following processes on the p-V diagrams: i) isobaric, ii) isochoric,
iii) isothermal, iv) cyclic.
Define Fermi energy. Show that the expression of Fermi-energy is given by
How it is related with Fermi-temperature.
the average height at which a molecule makes its last collision before crossing
the plane is
2λ.
3