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A 1000 W heater is used to heat 1.0 kg of ice initially at -20 °C until it is transformed into steam at 120 °C and 1.0 atm. How many minutes does it take:
(a) To raise the temperature of the ice to 0 °C?
(b) To melt the ice?
(c) To heat the water to 100 °C?
(d) To boil the water?
(e) To heat the steam to 120 °C?
The constant-pressure specific of the steam is 0.452 kcal kg-1 K-1. Other data are available in Tables 1.2 and 5.1.
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