Sig Figs

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Sig Figs

Postby ntruong2H » Mon Feb 13, 2017 7:38 pm

When trying to figure out how many sig figs to use, do we take into account the values given for temperature? Or do we ignore how many sig figs were reported for temperature? For instance, if a problem said it occurred at 25 degrees Celsius, and the rest of the values of the problem (say volume, moles, etc.) were reported in 3 significant figures, would our final answer have 2 sig figs or 3 sig figs? Or say we have to convert the temperature to Kelvin, do we now have 3 sig figs for temperature? Or do we use the given values for sig figs? Thank you. @Chem_Mod

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Re: Sig Figs

Postby Chem_Mod » Mon Feb 13, 2017 8:51 pm

Your answer would have 2 sig figs. Even if you convert to kelvin, your final answer should have the same number of sig figs as the values given. The only exception that you would never take into account for sig figs is when you have absolute values such specific heat capacities or exact values. We take sig figs because there is a level of uncertainty that we need to account for.

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