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Jared Khoo 1G
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Postby Jared Khoo 1G » Wed Feb 12, 2020 3:48 pm

Why is STP at 273.15 K (0 Celcius) and not 298 K like many constants are given at. Is there a separate constants list for values at STP?

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Postby KaleenaJezycki_1I » Wed Feb 12, 2020 3:56 pm

STP is 25 degrees Celsius that's why its 298K. At 0 degree celsius its 273.15K because to go from celsius to kelvin you add 273.15

Bryan Chen 1H
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Postby Bryan Chen 1H » Wed Feb 12, 2020 5:04 pm

i think 298 is 25+273 and 25 is considered "room temperature" not "standard"

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Postby vanessas0123 » Thu Feb 13, 2020 9:44 am

You should check the constants list and if it explicitly states that it's at STP and not 298K!

Nathan Nakaguchi 1G
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Postby Nathan Nakaguchi 1G » Thu Feb 13, 2020 10:21 am

STP is 0 Celsius, 273.15K and 1.00 atm. The equations should work the same except for when your dealing with things like where typically those constants are calculated from 298 K. Its probably best to make sure the constants you're dealing with explicitly say it was calculated from STP or 298K.

Max Madrzyk Dis 4G
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Postby Max Madrzyk Dis 4G » Thu Feb 13, 2020 10:50 am

298 K is 25 C which is room temperature and not standard temperature.

Abhi Vempati 2H
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Postby Abhi Vempati 2H » Thu Feb 13, 2020 1:50 pm

STP, which is standard temperature and pressure, is 1 atm and 273 K (273.15, to be specific).

This is often confused with standard state/standard conditions, which is 298 K, This is also referred to as room temperature.

Hope this helps!

kendal mccarthy
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Postby kendal mccarthy » Sun Feb 16, 2020 9:47 pm

STP is just 273.15K and 1 atm. These values are mainly just for theoretical calculations because 0K is not feasible in everyday life.

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