The effective volume of the cylinder in an air compressor is 30 cu ft. When the volume is reduced to 5 cu ft by the motion of the piston, the discharge valves open. If the temperature of the original air is 17 C at atmospheric pressure and that of the discharged air is 52 C, what is the absolute pres- sure of the discharged air? A. 14.7 psi B. 98.8 psi C. 290 psi D. 325 psi