300 g of water at 25 ° C is added to 100 g of ice at 0 ° C . The final temperature of mixture is

Question

300 g of water at 25 ° C is added to 100 g of ice at 0 ° C . The final temperature of mixture is, - 5 3 ° C, - 5 4 ° C, - 5 ° C, 0 ° C

MARKS App · Accepted Answer

Heat required for 100 g ice to melt is Q 1 = m L = 100 80 = 8000 cal Heat given by 300 g water when it cools to 0 ° C . Q 2 = m s Δ θ = 300 1 25 - 0 Q 2 = 7500 cal As Q 2 Q 1 Therefore ice cannot melt completely and final temperature of mixture is 0 ° C .

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