STP stands for Standard Temperature and Pressure. It is defined as 273K at 1 atmosphere pressure. All temperatures used in problems with gasses must use the Kelvin (absolute) temperature scale. To convert from degrees C to degrees Kelvin, remember "K is C plus 273" (degrees C + 273 = K) 1 atmosphere of pressure can also be expressed as 101.3 Kilopascals, or 760mmHg (millimeters of mercury). |
Your turn! For each of the following convert the temperature to K, or change the pressure units as indicated.
Change: | to: | Check your answer |
35°C | K | |
-25°C | K | |
1.3 atm | mmHg | |
400 mmHg | atm |