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An engine is used to run a refrigerator as shown in the figure below. engine refrigerator H-eng C-ref H-eng QC-ref C-eng H ref where TH-eng-495 K, Tc-ref = 277 K, and T= 292 K.

If (QH/t)eng = 115 W, (QC/t)eng = 104 W, and (QH/t)ref = 165 W then:

i) What is the thermal efficiency of the engine? η = ? (3sf)

ii) What is the coefficient of performance of the refrigerator? K = ? (3sf)

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