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During each cycle, a refrigerator ejects 625 kJ of energy to a high-temperature reservoir and takes in 550 kJ of energy from a low-temperature reservoir. a. Explain how a fridge works. b. What are the known variables? c. What equation(s) could we use here? d. Determine the work done on the refrigerant in each cycle. e. How efficient is this refrigerator?

Answer :

davidlcastiblanco

Answer:

a. Work as a exchange of heat

b. [tex]Q_h=625kJ[/tex] and [tex]Q_c=550kJ[/tex]

c. [tex]W= Q_h-Q_c[/tex], [tex]C=\frac{Q_c}{W}[/tex]

d. [tex]W=75kJ[/tex]

e. [tex]C=7.3[/tex]

Explanation:

a. A fridge work as a exchange of heat to coolest the food inside the power is high to low the temperature ambient and refresh

b. The variables known are [tex]Q_h=625kJ[/tex] and [tex]Q_c=550kJ[/tex]

c. Equations Work and Heat

[tex]W= Q_h-Q_c[/tex]

[tex]C=\frac{Q_c}{W}[/tex]

d. [tex]W=Q_h-Q_c[/tex]

[tex]W=635-550[/tex]

[tex]W=75kJ[/tex]

e. [tex]C=\frac{Q_c}{W}[/tex]

[tex]C=\frac{550kJ}{75kJ}[/tex]

[tex]C=7.3[/tex]

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