Values of Some Constants
| Quantity | Symbol | Value |
| Gas constant | R | 8.3144 J/K-mol 0.082058 L atm/K-mol |
| Zero of the Celsius scale | to | 273.15 K * |
| Normal Atmospheric Pressure | Po | 101.325kPa * |
| Molar
volume of an ideal gas at STP |
Vm | 22.4 14 L/mol |
| Avogadro constant | NA, L | 6.0220 x 1023 mol -1 |
| Molar
heat capacity of liquid water |
Cp | 75.48 J/K-mol |
| 1 atm = 101.325 kPa * |
| 1 atm = 760 torr * |
| 1 atm = 760.00 mmHg |
| 1 cal = 4.184 J * |
* The asterisks above designate exact quantities.