1. Consider the van der Wasla equation a (p+Vf:)(Vmb)RT=0 (1) Where p, Vm, T, are, respectively, pressure, molar volume, and temperature and R, a, and b are constants. 3) Find (331%)}, by computing the differential of (1) at constant p. b) Find (%;E)T by computing the differential of (1) at constant T. (3) Use the expressions for (a???) and (%})T and suitable relationships between 1" partial derivatives to nd (%)V cl) Use the expressions for )v and (2%?) and suitable relationships between m 9 partial derivatives to nd (613m)}. 6) Use (32%),. to nd (3%)], Find the value of V", at which both of these deriva- tives are zero