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sig figs (1 Viewer)

drm

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do we include the sig figs of temperatures when determining the lowest no. of sig figs? asking because the answer to a try it yourself question in the pearson textbook had 3 sig figs, however the lowest no. of sig figs in the question (if temp. was included) was 2 (see attached)
Screen Shot 2024-05-06 at 00.36.38.png
ans was 0.0248
 

wizzkids

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This is a good question. The answer is, "It depends".
I think you need to separate the data into two categories. You only need the values for volume and moles to calculate the K for the reaction. They each have 3 sig. figs so you are justified to use three significant figures for K. Now temperature is not directly included in the calculation of K so we need to consider T separately.
You could state that you know the value of K to 3 sig. figs but the relevant temperature is only +/- 0.5 degree C because that is the instrumental uncertainty if you quote T = 60oC. Does that help?
 
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