Water is to be heated from room temperature (t = 10 °c) to boiling (t = 1 10 c) for a temperature rise of δt=100 °c. give the initial temperature, ti , final temperature, t, and temperature rise, δt in degrees kelvin (k)

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