Chapter 5, Problem 5.30NP

Interpretation Introduction

Interpretation:

The entropy changes; ΔS, ΔS_surr and ΔS_universe per day for the air conditioned house with an interior temperature of 65 F and exterior temperature of 99 F, needs to be calculated

Concept Introduction:

The coefficient of performance (η) of a Carnot refrigerator can be expressed as a ratio of the heat withdrawn from the cold reservoir (q_cold) to the work done (w) by the device

  $\text{η = }\frac{{\text{q}}_{\text{cold}}}{\text{w}}=\frac{{\text{q}}_{\text{cold}}}{{\text{q}}_{\text{hot}}{\text{+q}}_{\text{cold}}}\text{ ------(1)}$