Question

A refrigerator transfers 250 J heat per second from -23 Degree C to 25 degree C. Find the power consumed , assuming no loss of energy

Answer 1

Hi

Here is your answer,

Here Q₂ = 250 Js⁻¹ 

  T₂ = -23°C = - 23 +  273 = 250 K 

   T₁ = 25°C = 25 + 273 = 298 K 


We know,

                  β = Q₂/W = T₂/T₁ - T₂

                  W = 250 (298 - 250 )/250 = 250 × 48/250

                  W = 48 Js⁻¹


Hope it helps you !