At time t = 0, a vessel contains a mixture of 15 kg of water and an unknown mass of ice in equilibrium at 0°C. The tempe

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At time t = 0, a vessel contains amixture of 15 kg of water and an unknown mass of icein equilibrium at 0°C. The temperature of the mixture is measuredover a period of an hour, with the following results: During thefirst 48 min, the mixture remains at 0°C;from 48 min to 60 min, the temperatureincreases steadily from 0°C to 2.0°C. Neglecting the heat capacityof the vessel, determine the mass of ice that was initially placedin the vessel. Assume a constant power input to thecontainer. kg