When using PV=nRT, what is STP?
Standard temperature pressure? The volume is 22.4, how about the temperature in K and pressure in atm?
- Johnny DLv 71 decade agoFavorite Answer
STP is standard temperature and pressure. Standard temperature is 0°C or 273 K. Standard pressure is 1 atm or 101.3 kPa or 760 mmHg.
Note: The volume of one mole of a gas at STP is 22.4 L. If you don't have one mole of a gas the the volume is not 22.4 L.
- HPVLv 71 decade ago
STP refers to "Standard Temperature and Pressure" which are 1 atm and 0 C. If you put those values in the ideal gas law, you find that
PV = nRT
V/n = RT/P = (0.0821)(273) / (1) = 22.4 L.
So at STP the molar volume of any gas is 22.4 L. I never liked using 0 C because it's freezing! If you recalculate V/n at 25 C (77 F) you get a molar volume of 24.2 L.
- Facts MatterLv 71 decade ago
Again, the other answers are correct.
BTW, I learnt about STP in high school, but never used it again in a lifetime in chemistry. It is nearly always more straightforward to start from
PV = nRT
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- HydrochoerusLv 41 decade ago
0 °C (273.15 K) and 101.325 kPa (i.e., 1 atmosphere of absolute pressure).