Refrigerator – heat rejected per unit work

2016 Phase II 1 question

1. 1 Thermodynamics
   The temperature inside a refrigerator is $t_2$°C and the room temperature is $t_1$°C. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be:
   A $\frac{t_2 + 273}{t_1 - t_2}$ B $\frac{t_1 + t_2}{t_1 + 273}$ C $\frac{t_1}{t_1 - t_2}$ D $\frac{t_1 + 273}{t_1 - t_2}$
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