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Question

One gram of water at 800C is mixed with one gram of ice at 00C. The resultant temperature is:

A
1000C
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B
00C
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C
800C
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D
400C
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Solution

The correct option is D 00C
Let us assume that the complete ice melts and final temperature is T. Then, by principle of calorimetry,

1(1)(80T)=1(80)+1(0.5)(T0)

80T=80+0.5T

T=00C

Hence, all the ice just melts and final temperature is 00C.

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