A refrigerator that consumes 3 kW of electricity when running and has a coefficient of performance of 1.5 is placed in a well-sealed room, and is plugged in with its door open. The rate of cooling or heating this refrigerator will provide to the air in the room when running is

Question

Quizplus · Accepted Answer

Solved by EES Software. Solutions can be verified by copying-and-pasting the following lines on a blank EES screen. 
W_in=3 "kW"
COP=1.5
"From energy balance, heat supplied to the room is equal to electricity consumed,"
E_supplied=W_in "kJ/s, heating"
"Some Wrong Solutions with Common Mistakes:"
W1_E=-W_in "kJ/s, cooling"
W2_E=-COP*W_in "kJ/s, cooling"
W3_E=W_in/COP "kJ/s, heating"
W4_E=COP*W_in "kJ/s, heating"

A Refrigerator That Consumes 3 KW of Electricity When Running