Life Sciences

density of water: wrong

density of water: wrong

Postby rjcroy » Thu May 28, 2009 6:54 am
If I enter the query "density of water at 25 deg C" it reports 846.6 kg/m3.
This is wrong. Other temperatures like 40 deg C report the wrong answer too.
What is going on?

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Re: density of water: wrong

Postby superflow » Thu May 28, 2009 7:23 am
Press “referring to thermodynamics” link at the top of the page and you get this:
http://www.wolframalpha.com/input/?i=density+of+water+at+25+deg+C&a=*MC.~-_*ThermodynamicPropertyPhrase-
Vitaliy Kaurov, CSI CUNY
http://www.kaurov.com
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Re: density of water: wrong

Postby GeorgePowell » Fri May 29, 2009 2:26 pm
This is a very wrong. W|A is meant to be trust worthy, things like this will ruin their reputation.
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Re: density of water: wrong

Postby Aritaborian » Sat May 30, 2009 12:31 am
It still goes wrong…
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Re: density of water: wrong

Postby Aritaborian » Tue Jun 02, 2009 2:39 pm
But if I use "water density 20 degrees Celsius pressure 1 atmosphere" (or other temperature value) Alpha reports (more) correct results! And also shows table of thermodynamic properties of water and its phase diagram.
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Re: density of water: wrong

Postby ali45 » Thu Jun 04, 2009 7:59 pm
You have to remember that is relatively new system adn it will get things wrong all we can do is report them and hope they fix them
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Re: density of water: wrong

Postby t3roar » Fri Jun 05, 2009 10:53 pm
I agree that this is a big problem as this is not the most complex of things to get wrong.

This demonstrates that they have the correct information wrongly entered:

http://www.wolframalpha.com/input/?i=density+of+water+vs+temperature
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Re: density of water: wrong

Postby Izno » Fri Jun 12, 2009 7:05 am
The graph looks fine to me...
Engineering student at Stevens Institute of Technology
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Re: density of water: wrong

Postby cath01ka » Thu Feb 03, 2011 4:32 pm
This is a very wrong. W|A is meant to be trust worthy, things like this will ruin their reputation.
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Re: density of water: wrong

Postby yos233 » Fri Apr 08, 2011 9:18 pm
Would you care to provide a more accurate link?
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Re: density of water: wrong

Postby NinaAdbyte » Wed May 18, 2011 2:07 pm
I just tested and the calculation seems to be correct. (In my example)

rgds Nina
"If I had known the consequences, I would have become a watchmaker." Albert Einstein
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Re: density of water: wrong

Postby fidel123 » Wed Jul 13, 2011 5:42 am
An extensive detailed table of pure water density was drawn up by Chuck Snelling, with water at its maximum density at 4.0°C. At room temperature, taken as 25°C the density is 0.997044g/cm³

1 g/cm3

20 degrees is just around room temperature, so i would say about 1 g/cm3

besides, the actual density is 0.9982071g/cm3
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