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STP

Posted: Wed Feb 12, 2020 3:48 pm
by Jared Khoo 1G
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?

Re: STP

Posted: Wed Feb 12, 2020 3:56 pm
by KaleenaJezycki_1I
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

Re: STP

Posted: Wed Feb 12, 2020 5:04 pm
by Bryan Chen 1H
i think 298 is 25+273 and 25 is considered "room temperature" not "standard"

Re: STP

Posted: Thu Feb 13, 2020 9:44 am
by vanessas0123
You should check the constants list and if it explicitly states that it's at STP and not 298K!

Re: STP

Posted: Thu Feb 13, 2020 10:21 am
by Nathan Nakaguchi 1G
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.

Re: STP

Posted: Thu Feb 13, 2020 10:50 am
by Max Madrzyk Dis 4G
298 K is 25 C which is room temperature and not standard temperature.

Re: STP

Posted: Thu Feb 13, 2020 1:50 pm
by Abhi Vempati 2H
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!

Re: STP

Posted: Sun Feb 16, 2020 9:47 pm
by kendal mccarthy
STP is just 273.15K and 1 atm. These values are mainly just for theoretical calculations because 0K is not feasible in everyday life.