19 Find an expression for isothermal bulk modulus of elasticity for a gas which obeys Van der Waals 'law of state according to the equation: 1 P = pRT 1 - bp where a, b are constants and p, p, R and T have their usual meanings. ap RT

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.