The equation of state of a gas is given as v-(P + 10/ v-2) = 5 RuT, where the units of v- and P are m3/kmol and kPa, respectively. Now 0.2 kmol of this gas is expanded in a quasi equilibrium manner from 2 to 4 m3 at a constant temperature of 350 K. Determine
(a) the unit of the quantity 10 in the equation and
(b) the work done during this isothermal expansion process.