3) Heat capacity not always constant over a range of temperatures (textbook problem 1.22) The heat capacity of a substance is often reported in the form Cp,m= a + bT + c/T 2. Use this expression to make a more accurate estimate of the change in molar enthalpy of carbon dioxide when it is heated from 15C to 37C (as in Exercise 1.20), given a = 44.22 J K-1 mol-1, b = 8.79 x 10-3 J K-2 mol-1, and c = -8.62 x 105 J K mol-1. Hint: You will need to integrate dH = C, dT