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Question

5g of steam at 100oC is mixed with 5g of the ice at 0oC. The final temperature of the mixture is?

A
100oC
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B
95oC
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C
90oC
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D
80oC
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Solution

The correct option is A 100oC

Heat energy required for5gm of water at 0Cto get converted to water at 100C is latent heat required + heat required to change its temperature by 100=(805)+(51100)=900calories.

Now,heat liberated by 5gm of steam at 100C to get converted to water at 100C is 5537=2685 calories

So,heat energy is enough for 5gm of ice to get converted to 5gm of water at 100C

So,only 900 calories of heat energy will be liberated by steam,so amount of steam that will be converted to water at the same temperature is 900537=1.66g

So,the final temperature of the mixture will be 100C


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