At constant pressure one mole of an ideal gas is first, heated from the T to 3T and second, cooled back to T at constant volume.
a. Obtain an expression for ΔS for the overall process.
b. Illastrate that the overall process is equivalent to an isothermal expansion of the gas at T from V to 3V, where V is the original volume.
c. Illustrate that the value of ΔS for the process in a) is the same as that in b)