The COP for the heat pump is

Question

An industrial heat pump operates between the temperatures of 27⁰C and –13⁰C. The rates of heat addition and heat rejection are 750 W and 1000W, respectively. The COP for the heat pump is                              

      (a) 7.5                                                                 (b) 6.5

      (c) 4.0                                                                 (d) 3.0