The specific heat per unit mole of a particular ideal gas can be approximated between two temperatures of interest, t1, and t2. using the polynomial curve fit; cp = at^3 +b consider a process in which this gas starts at t1, and p1, and ends at t2, and p2. provide the appropriate mathematical expressions (in terms of a, b, t1, t2, p1, p2, and r, where r is the universal gas constant) which accounts for this variation in specific heat and calculates the a)- change in enthalpy per unit mole b)- change in entropy per unit mole