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Question

100 g of ice at 0oC is mixed with 100 g water at 100oC. What will be the find temperature of the mixture?

A
10oC
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B
20oC
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C
30oC
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D
40oC
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Solution

The correct option is A 10oC
Given, at 100 g ice. - mixed with 100 g water atO0 ice

heat required (Q1)=mwater ×Lfusion =100 g×80cal/gramQ1=8000cal (required)
heat released when 100C water convert into O0C water
Q2=mSΔT=100×1×100Q2=10000cal (released)

So, we have Q=Q2Q1 ( Extra) Q=2000 cal which is used to increase the temperature of whole Q=mg
2000=200×1×(T0)T=10C

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