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### STP

Posted: 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?

### Re: STP

Posted: 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

### Re: STP

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

### Re: STP

Posted: 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!

### Re: STP

Posted: 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 $\Delta G_{formation}^{0}$ 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
298 K is 25 C which is room temperature and not standard temperature.

### Re: STP

Posted: 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!

### Re: STP

Posted: 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.