Amixture of gases has 8 bar and the volumetric analysis of a gaseous mixture yields the following results: 10% co2 ; 6% o2 ; 80% n2 and 4% co. determine a. the partial pressures of the gases in the mixture. b. the gas constant of the mixture c. if 5 kg of mixture are cooled at constant pressure to 25c find the final volume.

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0