Question
An open vessel contains 0.5 kg of ice at -20 degree Celsius. The mass of the container can be neglected. Heat is supplied to the vessel at constant rate of 420 J/min for 500 min.
(a) After how many minutes does the ice start to melt?
(b) After how many minutes does the temperature start to rise above 0 degree Celsius?
(c) Plot a curve showing the elapsed time as abscissa and the temperature as ordinate.
(a) After how many minutes does the ice start to melt?
(b) After how many minutes does the temperature start to rise above 0 degree Celsius?
(c) Plot a curve showing the elapsed time as abscissa and the temperature as ordinate.