Question

At what pressure ratio tyyuudoes a Brayton cycle using a monatomic gas have an efficiency of 50 ?

Short answer

rytiu

Step-by-step solution

 Introduction

We know that for a refrigerator, the heat added to the environment is equal to the sum of the work done and the heat extracted from the cold reservoir. That is,

$Q_h=W+Q_c$ Q+ W

where W is the total work. This work will therefore be

$$

W=119-78=\underline{41 . J}

$$

Knowing the heat released in the heat reservoir, we can find the heat extracted as

$$

Q_{c}=Q_{h}-W

$$