Calculate the specific volume of air in ft3/lbm to 2 D.P. using the formula:
v = R * T / p where the temperature T is 542 oC, the absolute pressure p is 19.2 atm, and the specific gas constant R for air is 53.28 ft lbf / (lbm oR). 1 atm = 14.7 psia and T in oR = 460 + 1.8 * T in oC.