A. What is the amount of heat that must be removed in cooling 1 lb-mol of 0.8 Specific Gravity Natural Gas at 500 psia from 600F to 300F? (Use the chart)

B. If this gas is heated from 200F to 300F how much heat is required per lb-mol of gas?

Entropy, Btu per pound-mole per degree Fig. 3.II Enthalpy-Entropy diagram for 0.8 gravity natural gas. (After Brown.) Entropy, Btu per pound-mole per degree Fig. 3.II Enthalpy-Entropy diagram for 0.8 gravity natural gas. (After Brown.)