Sig Figs for Celsius

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Ryan Chang 1C
Posts: 105
Joined: Sat Aug 24, 2019 12:17 am

Sig Figs for Celsius

Postby Ryan Chang 1C » Mon Jan 27, 2020 9:53 pm

4A.19 A piece of copper of mass 20.0 g at 100.0 8C is placed in a vessel of negligible heat capacity but containing 50.7 g of water at 22.0 8C. Calculate the final temperature of the water. Assume that no energy is lost to the surroundings.

Are there any special rules for sig figs for calculations resulting in a temperature? For example, when I did the exact calculation for 4A.9, I got 24.7 degrees celsius since the least amount of sig figs in a given number is 3. However, the answer key says that the answer is 25 degrees celsius. Which answer should I use?

Ashley Tran 2I
Posts: 108
Joined: Thu Jul 11, 2019 12:17 am

Re: Sig Figs for Celsius

Postby Ashley Tran 2I » Mon Jan 27, 2020 9:55 pm

I would use 3 sig figs because that's following the rule of using the least number of sig figs provided in the prompt. Sometimes the textbook gets the number of sig figs wrong.

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