Question

how much heat energy is required to change 2kg of ice at 0'c in water at 20'c.
$\\ please \: answer \: fast$

Answer 1

hey your answer is
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40,025 calories......
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this is how you get that answer
latent heat of fusion of ice is 80cal/gm

L = Q/m ( heat required )
Q = 2000gm/80cal/gm = 25 cal
Now the Ice has changed into water which is at 0°C

Then the amount of heat needed to raise the temperature of mass=2000gm to 20°C is →
Q = mS▲T
Q = 2000 × 1 × (20-0)
Q = 40000cal

Total heat required=
40000 + 25= 40025cal

hope it is right.........