The mole fraction of oxygen in a container is 42%. If the total pressure in the container is 780 torr, what is the pressure of oxygen in the container? a. 1860 torr
b. 780 torr
c. 32760 torr
d. 328 torr

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.