A refrigerator uses 40 J of work to extract heat from a heat reservoir at 0.00$^{\circ}$C.If the coefficient of performance of the refrigerator is 2.1,then how much heat is extracted from the heat reservoir at 0.00$^{\circ}$C?
A) 48 J
B) 65 J
C) 84 J
D) 90 J

Question

Quizplus · Accepted Answer

Coefficient of performance (COP) = Heat extracted from reservoir/Work input
2.1 = Q/40
Q = 2.1 x 40
Q = 84 J

A Refrigerator Uses 40 J of Work to Extract Heat ∘^{\circ}∘

A Refrigerator Uses 40 J of Work to Extract Heat $^{\circ}$