TS EAMCET · Physics · Thermodynamics
The power of a refrigerator that can make 15 kg of ice at \(0{ }^{\circ} \mathrm{C}\) from water at \(30^{\circ} \mathrm{C}\) in one hour is
- A 6600 W
- B 1925 W
- C 1925 W
- D 2200 W
Answer & Solution
Correct Answer
(B) 1925 W
Step-by-step Solution
Detailed explanation
\(Q = mc_w\Delta T + mL_f\) \(Q = (15 \text{ kg})(4200 \text{ J kg}^{-1} {^{\circ}C}^{-1})(30^{\circ} \mathrm{C}) + (15 \text{ kg})(3.36 \times 10^5 \text{ J kg}^{-1})\) \(Q = 1890000 \text{ J} + 5040000 \text{ J} = 6930000 \text{ J}\) \(P = \frac{Q}{t}\)…
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