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question 1)   if 520.0 J are added to 150g of water at 30C, what will be...

question 1)   if 520.0 J are added to 150g of water at 30C, what will be the final temperature of water?

question 2) if 520.0 J are removed to 150g of water at 30C, what will be the final temperature of water?
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I tried doing question 1 but I didnt understand how come the answer of the change of temperature of 0.8280 was changed to 8.3 C and then added with 30.0 to get the answer final temperature of 38.3 C. why was the decimal place move to 8.3 in change in temperature.

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