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4.	50g of ice at 0°C is mixed with 50g of water at 80°C, what will be the final temperature of a mixture?
	A.	0°C
	B.	40°C
	C.	60°C
	D.	4°C

	Answer: Option A


	Explanation:
	Heat required to melt 50g ice = mL = 50×80=4000cal Heat given out by water in cooling from 80°C to 0 = mc∆T=50×1×80=4000cal Heat given by water is just sufficient to melt the whole ice. So the final temperature is 0°C.



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Published by:Michael Daani

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