6.2. (a) Making use of the fact that Eq. (6.21) is an exact differential expression, show that: (C/P)r=T(2V/T2)r What is the result of application of this equation to an ideal gas? (b) Heat capacities CF and CF, are defined as temperature derivatives, respectively, of U and H. Because these properties are related, one expects the hent capacities also to be related. Show that the general expression coanecting Cr to Cr is: CP=CV+T(TP)V(TV)r