Appendix A – Some Common Units Used in Hydrometallurgy
| SI Base Units | ||
|---|---|---|
| Physical quantity | SI name | SI unit abbreviation |
| length | metre | m |
| mass | kilogram | kg |
| time | second | s |
| electric current | ampere | A |
| thermodynamic temperature | Kelvin | K |
| amount of substance | mole | mol |
| SI Derived Units | |||
|---|---|---|---|
| Physical quantity | SI name | SI Unit | SI Base Units |
| force | newton | N | kg m s-2 |
| pressure | pascal | Pa | N m-2 |
| energy/work/heat | joule | J | N m |
| power | watt | W | J s-1 |
| electric charge charge of a mole of electrons |
coulomb Faraday |
C F |
A s 96484.6 C/mole of electrons |
| electric potential (electromotive force) | volt | V | J C-1 |
| electric resistance | ohm | V A-1 | |
| Celsius temperature | degrees Celsius | °C | K (1°C = 1 K) |
| Other Common Units | |||
|---|---|---|---|
| Physical quantity | Unit name | Symbol | Value in SI units |
| time | minute, hour, day, month, year | min, h, d, mon, y | 60, 3600, 86400; 1 y = 365 d |
| length | centimeter, millimeter | cm, mm | 0.01 m, 0.001 m |
| length | micron, nanometer | m, nm | 10-6 m, 10-9 m |
| volume | litre, millilitre | L, mL | 10-3 m3, 10-6 m3 |
| volume | litre | dm3 | (0.1 m)3 = 0.001 m3 |
| mass | tonne, gram, milligram | t, g, mg | 103 kg, 10-3 kg, 10-6 kg |
| mass | Troy ounce | oz Troy | 0.03110349 kg |
| concentration in solution | molar | M | mol/L or mol/dm3 |
| concentration in solution | molal | m | mol/kg (kg of solvent) |
| concentration in solution | (none) | g/L | |
| density | (none) | g/mL | 103 kg m-3 |
| pressure | kilopascal, atmosphere, pounds per square inch | kPa, atm, PSI | 103 Pa, 101325 Pa, 6894.76 Pa |
| pressure | bar, atmosphere, Torr = mm Hg (1 atm = 760 Torr) | bar, atm, Torr | 105 Pa, 133.322 Pa |
