Fifty (50.0) grams of hot water at 65.0oC is mixed with 40.0 g of cold water. The final temperature of the mixture is 45.0oC. (a) How much heat energy did the hot water lose? (b) How much heat energy did the cold water gain? (c) What was the initial temperature of the cold water?

Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter15: Energy And Chemical Change
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Problem 126A
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  1. Fifty (50.0) grams of hot water at 65.0oC is mixed with 40.0 g of cold water. The final temperature of the mixture is 45.0oC. (a) How much heat energy did the hot water lose? (b) How much heat energy did the cold water gain? (c) What was the initial temperature of the cold water?
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