(a) Write the isothermal relation between pressure and volume.
(b) Write an expression for work done during isothermal change.
(a) Pressure x Volume = Constant
or PV = Constant
(b) Work done is
W = μRT ln(V2/V1)
where R is the universal gas constant, μ is the number of moles of gas, T is the absolute temperature, V1 is the initial volume and V2 is the final volume of the gas.
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