Problem 43P

A food department is kept at - 12°C by a refrigerator in an environment at 30°C. 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.

C101 Elementary Chemistry IUPUI Week 1 (1/13) Density 1) Definition: Amount of mass packed into volume a) Density = mass/volume 2) Density of water is 1.0 g/mL a) 1g of water = 1 mL b) 1 mL of water weighs 1g 3) Density of Hg (mercury) is 13.6 g/mL a) 1 gal of Hg is like lifting 14 gallons of milk Typical Density Problems: 1) Given 3 variables (D, m, V) a) Given 2, solve for 1 b) Units are IMPORTANT c) Can use density equation OR conversion 2) Example Problem #1 a) Density = 13.6 g/mL 13.6g Volume = 5.50 mL mL × 5.50mL = Mass = 3) Example Problem #2 a) Density = 0.912 g/mL 1mL Volume = 75.4