Air conditioners are rated by their coefficient of performance at 61 ∘ f inside temperature and 99 ∘ f outside temperature. an efficient but realistic air conditioner has a coefficient of performance of 3.2. what is the maximum possible coefficient performance?

the maximum possible coefficient performance is 13.7

Explanation:

inside temperature, = 61 F = 289.26 K

outside temperature, = 99 F = 310.37 K

coefficient of performance, COP (real) = 3.2

according to Carnot's theorem, the coefficient of performance is

=

where

is cold temperature

is hot temperature

thus,

 =

             = 13.7

about 45° and at the middel