Question

2kg of ice at -20 is mixed with 5kg of water at 20 c in an insulating vessel.calculate the final mass of water remaining in the container

Answer 1

Answer:

when both are at o degree .

heat released by water= ms delta t

=5×1×20=100 J

heat gained by ice=ms(ice)delta t

= 2×1/2×20=20J

remaining heat= 100-20= 80J

This energy will convert ice into water

Latent heat of freezing is 80

so it will convert 1kg ice into water.

So vessel will contain6kg water and 1kg ice at o degree.

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