A freezer is connected to a power source powered by a fuel with a calorific value of 35000 kJ/kg and a density of 0.85 g

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A freezer is connected to a power source powered by a fuel
with a calorific value of 35000 kJ/kg and a density of 0.85 g/cm3 .
The temperature inside the freezer is 0°C, the outside
temperature is 20°C.
According to the information given above, How much work is
required to freeze 500 g of water? How much internal energy
change occurs during the process? Since the power
source consumes 5 L of fuel per hour, calculate the thermal
efficiency of this engine.
(ΔfreezingH° = 6.02 kJ mol– 1 )