2) The heat capacity of nitrogen gas is given by the Shomate equation: cp=A+Bt+Ct2+Dt3+E/t2 where A=19.50583,B=19.88705,C=8.598535,D=1.369784 and E=0.527601 (cp in Jmol1K1,t= Temperature (K) /1000). Calculate the mean molar heat capacity of nitrogen between 600K and 2000K. c. Hydrogen is produced by reacting natural gas (methane) with steam in a reformer, using a nickel-based catalyst. The pure natural gas feed enters the process at 500C and the reformer operates at 850C. i. Write down the balanced chemical equation for the steam reformation of methane to form hydrogen and carbon monoxide. [1 mark] ii. State Hess' Law and write an expression for the standard heat of reaction. [3 marks] iii. Determine the heat requirement of the steam reformation process and comment on the sign of your answer. [10 marks] Heats of formation are given in Table 1 and mean molar heat capacities are given in Table 2