3) An open container of negligible mass holds 0.25 kg of ice at -16.0 degrees Celsius. A hotplate provides heat to the container at a rate of 450 J/min for 300 min. [Cwater = 4187 J kg'K1, Cice = 2097 J kgK1, Lr(water) = 333 kJ kg] a) After how many minutes does the ice start to melt? b) How many minutes after the ice starts melting does it take for the temperature to rise above 0 degrees Celsius? c) What final temperature is reached?

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3) An open container of negligible mass holds 0.25 kg of ice at -16.0 degrees
Celsius. A hotplate provides heat to the container at a rate of 450 J/min for 300
min.
[Cwater = 4187 J kg K1, Cioe = 2097 J kg1K1, Lr(water) = 333 kJ kg]
a) After how many minutes does the ice start to melt?
b) How many minutes after the ice starts melting does it take for the temperature
to rise above 0 degrees Celsius?
c) What final temperature is reached?
d) Sketch a graph showing the temperature as a function of the elapsed time.
Transcribed Image Text:3) An open container of negligible mass holds 0.25 kg of ice at -16.0 degrees Celsius. A hotplate provides heat to the container at a rate of 450 J/min for 300 min. [Cwater = 4187 J kg K1, Cioe = 2097 J kg1K1, Lr(water) = 333 kJ kg] a) After how many minutes does the ice start to melt? b) How many minutes after the ice starts melting does it take for the temperature to rise above 0 degrees Celsius? c) What final temperature is reached? d) Sketch a graph showing the temperature as a function of the elapsed time.
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