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38. The temperature of 600 g of cold water risesby 15°C when 300 g of hot water at 50°C isadded to it. What was the initialtemperature of the cold water? [Ans. 5°C |
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Answer» Let mass or m = 600g, m1 = 300g, heat capacity of water = c. T be the initial temperature and T1 be the final temperature of the liquid. According to the question, mc (T1 – T) = m1 c (50 – T1) 600 c (T1 – T) = 300 c (50-T1) Therefore, initial temperature is equal to 5 degree Celsius. |
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