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Topic: Rounding my answer. Which is more accurate?  (Read 3251 times)

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Offline Miss1nik2

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Rounding my answer. Which is more accurate?
« on: December 03, 2008, 11:41:31 PM »
I am trying to find pressure.

R=.0821
T=1273 K
V=2
n=.0997

When I put .0997 in the PV=nRT equation I get 5.2 atm, and when I put in .09 I get 4.7 atm.

Which answer should I put? Which is more accurate?
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Offline nj_bartel

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Re: Rounding my answer. Which is more accurate?
« Reply #1 on: December 04, 2008, 12:38:13 AM »
If you're going to round, 0.1 would be the correct number to round to.  The 0.0997 would obviously be more accurate... assuming that's what your unrounded number is and .09 is your rounded number.
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Offline Borek

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Re: Rounding my answer. Which is more accurate?
« Reply #2 on: December 04, 2008, 03:10:04 AM »
Why do you try to round your DATA instead of rounding your CALCULATION RESULT?
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