assuming the tube surface to have a uniform temperature corresponding to that of the phase change, determine the water outlet temperature and total heat transfer rate for a water flow rate of 0.1 kg/s and an inlet temperature of 60 c. if h w 0.25 m, how long would it take to completely liquefy the paraffin, from an initial state for which all the paraffin is solid and at 27.4 c?

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