(c) (5%) When the direct evaporative cooling is applied in the space, how many degrees of the maximum temperature drop can be achieved?

5. (10%) The ambient temperature in an outdoor ice-skating rink is at -5℃. How much force should one exert to skate smoothly at this temperature if the width and length of the skate blade are 1 min and 30 cm ? Assume that enthalpy of fusion for water is 333.55 J/g. The density of water and ice at this temperature are assumed 1000 kg/m3and 917.5 kg/m3. Please state clearly all of your assumptions.

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(c) (5%) When the direct evaporative cooling is applied in the space, how many degrees of the maximum temperature drop can be achieved?

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