How much time passes before the ice starts to melt? - after how many minutes does the ice start to melt
An open ice mass 0570 kg at a temperature of -12.0 C. The mass of the container can be ignored. Heat is supplied to the container at a constant speed of 820 J / minute.
The specific heat of ice 2100 J / kg K and heat of fusion of ice is 334 * 10 ^ 3J/kg.
How much time elapses before the ice starts to melt?
From the moment he begins warming, how much time is required for the temperature begins to rise above 0 ° C?
After How Many Minutes Does The Ice Start To Melt How Much Time Passes Before The Ice Starts To Melt?
1 comments:
The first ice at temperatures below 0 ° C. followed by ....
2.1J x 570g / g / ° C x 12 ° C Delta T = 14,364 J
To achieve 820J/min J ÷ 14,364 = 17.5 minutes for the ice 0 ° C.
To melt the ice, which begins immediately, the last of the ice melted .=
570g x 334J / g = 190,380 J.
820J/min J = 190,380 ÷ 232 minutes. (3.87 hours, 3 hours 54min).
At that time the water temperatures begin immediately earning a fraction of a ° C when the first part penetrates the Joule heat.
The whole time that we increase the water temperature above 0 ° C
= 4 hours 11 minutes and a half.
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