Difference between revisions of "Density"
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| + | | style="text-align:center;"| +727 | ||
| + | | style="text-align:center;"| 0.340 | ||
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| + | | style="text-align:center;"| +227 | ||
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| + | | style="text-align:center;"| -73 | ||
| + | | style="text-align:center;"| 1.746 | ||
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Revision as of 17:09, 18 December 2015
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The term density is the mass of a substance per unit volume. The symbol most often used for density is ρ, and sometimes the letter D can also be used. Mathematically, density is defined as mass divided by volume:
- ρ = m/V
Where m = mass of the substance, V = volume.
Density is measured in g/cm3 or kg/m3.
The density of a substance is influenced by a variety of factors, such as pressure or temperature. They have little influence for most solid materials, but there's a significant effect on the density of solids and liquids.
Density is calculated depending on the type of material:
- Homogeneous materials: The density at all regions of a homogeneous object equals its total mass divided by its total volume.
- Heterogeneous materials: The density varies between different regions of the object. The density of heterogeneous materials is calculated by determining the densities of many small volumes around various locations of the said material.
- Non-compact materials: Materials such as flakes, pellets, granules or powders contain voids, such as air, water or other fluids. The density of such materials is determined by multiple methods, such as pycnometer method or mathematical expressions for various geometric shapes.
Contents
List of densities
Common densities
| Material | Density (kg/m3) | Notes |
|---|---|---|
| Hydrogen | 0.08988 | At 0 °C and 101.325 kPa |
| Helium | 0.146 | At 300 K and 101.325 kPa |
| Aerographite | 0.2 | The air inside is excluded |
| Neon (gas) | 0.9 | At 0 °C and 101.325 kPa |
| Metallic microlattice | 0.9 | The air inside is excluded |
| Aerogel | 1.0 | The air inside is excluded |
| Air | 1.2 | Standard conditions |
| Oxygen (gas) | 1.308 | At 300 K |
| Fluorine (gas) | 1.696 | 0 °C and 101.325 kPa |
| Argon (gas) | 1.784 | 0 °C and 101.325 kPa |
| Nitrous oxide (gas) | 1.8724 | At 15 °C and 1.013 bar |
| Chlorine (gas) | 3.2 | 0 °C and 101.325 kPa |
| Krypton (gas) | 3.749 | 0 °C and 101.325 kPa |
| Xenon (gas) | 5.894 | 0 °C and 101.325 kPa |
| Radon (gas) | 9.73 | 0 °C and 101.325 kPa |
| Tungsten hexafluoride (gas) | 12.4 | Standard conditions |
| Liquid hydrogen | 70 | At –255 °C |
| Styrofoam | 75 | Average type of styrofoam |
| Slush hydrogen | 85 | At -259 °C |
| Solid hydrogen | 86 | At <−259.14 °C |
| Liquid helium | 147 | At 4 K |
| Cork | 240 | Average type of cork |
| Pine | 373 | |
| Liquid methane | 422.62 | at 111.5 K |
| Lithium | 535 | |
| Wood | 700 | Seasoned, typical |
| Oak | 710 | |
| RP-1 | 773 | At 25°C |
| Unsymmetrical dimethylhydrazine | 783 | At 25°C |
| Acetone | 790 | |
| Diesel | 800 | At standard conditions |
| Gasoline | 803 | Average type, standard conditions |
| Nitrogen (liquid) | 808 | At boiling point |
| Kerosene | 810 | At standard conditions |
| UH25 | 829 | At 25°C |
| Potassium | 860 | |
| Benzene | 870 | At standard conditions |
| Monomethylhydrazine | 874 | At 20°C |
| Ethylene oxide | 882.6 | At 10°C |
| Aerozine 50 | 900 | At 25°C |
| Ice | 916.7 | At 0 °C |
| Nitrous oxide (liquid) | 931 | At 0 °C at 31.1 bar |
| Sodium | 970 | |
| Silicone | 993 | |
| Water | 1,000 | At 4 °C |
| Hydrazine | 1,008.5 | At 20 °C |
| Sea water | 1,030 | |
| Milk | 1,030 | At 20 °C |
| Acetic acid | 1,050 | |
| Skin | 1,050 | |
| Human body (average) | 1,062 | |
| Nylon | 1,150 | |
| Oxygen (liquid) | 1,155 | |
| Plastics | 1,175 | Approx. for PP, PETE and PVC |
| Neon (liquid) | 1,207 | At boiling point |
| Nitrogen (gas) | 1,251 | At 0 °C and 101.325 kPa) |
| Glycerol | 1,261 | Standard conditions |
| Argon (liquid) | 1,395.4 | At boiling point |
| Honey | 1,420 | |
| Dinitrogen tetroxide | 1,445 | At 20 °C |
| Hydrogen peroxide | 1,450 | Pure, at 20 °C |
| Rubidium (liquid) | 1,460 | At melting point |
| Fuming nitric acid | 1,500 | |
| Fluorine (liquid) | 1,505 | At boiling point |
| Rubidium | 1,532 | At room temperature |
| Sucrose | 1,550 | |
| Calcium | 1,550 | |
| Chlorine (liquid) | 1,562.5 | At boiling point |
| Tetrachloroethylene | 1,622 | Standard conditions |
| Magnesium | 1,740 | |
| White phosphorus | 1,823 | |
| Concentrated sulfuric acid | 1,830 | |
| Cesium (liquid) | 1,843 | At melting point |
| Beryllium | 1,850 | |
| Francium | 1,870 | Predicted, at room temperature |
| Bone | 1900 | Average human bone |
| Sulfur (gamma) | 1,920 | |
| Cesium | 1,930 | At room temperature |
| Sulfur (beta) | 1,960 | |
| Oleum (60%) | 2,000 | |
| Sulfur (alfa) | 2,070 | |
| Sodium chloride | 2,165 | |
| Sodium bicarbonate | 2,200 | |
| Silicon | 2,330 | |
| Red phosphorus | 2,340 | |
| Boron | 2,340 | |
| Violet phosphorus | 2,360 | |
| Strontium (liquid) | 2,375 | At melting point |
| Concrete | 2,400 | |
| Krypton (liquid) | 2,413 | At boiling point |
| Quartz | 2,600 | |
| Strontium | 2,640 | At room temperature |
| Black phosphorus | 2,690 | |
| Aluminium | 2,700 | |
| Scandium (liquid) | 2,800 | At melting point |
| Xenon (liquid) | 2,942 | At boiling point |
| Scandium | 2,985 | At room temperature |
| Bromine | 3,102.8 | Standard conditions |
| Diiodomethane | 3,325 | |
| Barium (liquid) | 3,338 | At melting point |
| Diamond | 3,500 | |
| Barium | 3,530 | At room temperature |
| Iodoform | 4,008 | |
| Yttrium (liquid) | 4,240 | At melting point |
| Carbon tetraiodide | 4,320 | |
| Radon (liquid) | 4,400 | At boiling point |
| Yttrium | 4,472 | |
| Titanium | 4,540 | |
| Tungsten hexafluoride (solid) | 4,560 | At −9 °C |
| Selenium | 4,800 | |
| Iodine | 4,933 | |
| Germanium | 5,323 | |
| Radium | 5,500 | At room temperature |
| Arsenic | 5,727 | |
| Zirconium (liquid) | 5,800 | At melting point |
| Gallium | 5,910 | At room temperature |
| Lanthanum (liquid) | 5,940 | At melting point |
| Gallium (liquid) | 6,095 | At melting point |
| Vanadium | 6,100 | |
| Lanthanum | 6,162 | At room temperature |
| Ytterbium (liquid) | 6,210 | At room temperature |
| Tellurium | 6,240 | |
| Astatine | 6,350 | Predicted, at room temperature |
| Praseodymium (liquid) | 6,500 | At melting point |
| Zirconium | 6,520 | |
| Cerium (liquid) | 6,550 | At melting point |
| Antimony | 6,690 | |
| Cerium | 6,770 | At room temperature |
| Praseodymium | 6,770 | At room temperature |
| Neodymium (liquid) | 6,890 | At melting point |
| Ytterbium | 6,900 | At room temperature |
| Zinc | 7,000 | |
| Neodymium | 7,010 | At room temperature |
| Indium (liquid) | 7,020 | At melting point |
| Europium (liquid) | 7,130 | At melting point |
| Samarium (liquid) | 7,160 | At melting point |
| Chromium | 7,200 | |
| Promethium | 7,260 | At room temperature |
| Europium | 7,264 | At room temperature |
| Indium | 7,310 | At room temperature |
| Tin | 7,310 | |
| Manganese | 7,325 | |
| Gadolinium (liquid) | 7,900 | At melting point |
| Samarium | 7,520 | At room temperature |
| Terbium (liquid) | 7,650 | At melting point |
| Iron | 7,780 | |
| Gadolinium | 7,900 | At room temperature |
| Terbium | 8,230 | At room temperature |
| Holmium (liquid) | 8,340 | At melting point |
| Dysprosium (liquid) | 8,370 | At melting point |
| Dysprosium | 8,540 | At room temperature |
| Thulium (liquid) | 9,320 | At melting point |
| Niobium | 8,570 | |
| Brass | 8,600 | |
| Cadmium | 8,650 | |
| Holmium | 8,790 | At room temperature |
| Einsteinium | 8,840 | At room temperature |
| Erbium (liquid) | 8,860 | At melting point |
| Cobalt | 8,900 | |
| Nickel | 8,900 | |
| Copper | 8,940 | |
| Erbium | 9,066 | At room temperature |
| Polonium (alpha) | 9,196 | |
| Lutetium (liquid) | 9,300 | At melting point |
| Thulium | 9,320 | At room temperature |
| Polonium (beta) | 9,398 | |
| Bismuth | 9,750 | |
| Lutetium | 9,841 | At room temperature |
| Actinium | 10,000 | At room temperature |
| Molybdenum | 10,220 | |
| Silver | 10,500 | |
| Technertium | 11,000 | |
| Thallium (liquid) | 11,220 | At melting point |
| Lead | 11,340 | |
| Thorium | 11,700 | |
| Thallium | 11,850 | At room temperature |
| Hafnium (liquid) | 12,000 | At melting point |
| Americium | 12,000 | At room temperature |
| Palladium | 12,023 | |
| Rhodium | 12,410 | |
| Ruthenium | 12,450 | |
| Berkelium (beta) | 13,250 | At room temperature |
| Hafnium | 13,310 | At room temperature |
| Curium | 13,510 | At room temperature |
| Mercury | 13,546 | |
| Berkelium (alpha) | 14,780 | At room temperature |
| Californium | 15,100 | At room temperature |
| Protactinium | 15,370 | At room temperature |
| Tantalum | 16,600 | |
| Neptunium (gamma) | 18,000 | At 639 °C |
| Uranium | 18,900 | |
| Tungsten | 19,250 | |
| Gold | 19,320 | |
| Neptunium (beta) | 19,360 | At 313 °C |
| Plutonium | 19,840 | |
| Neptunium (alpha) | 20,450 | At 282 °C |
| Rhenium | 21,020 | |
| Platinum | 21,450 | |
| Iridium | 22,420 | |
| Osmium | 22,570 | |
| Rutherfordium | 23,200 | Predicted, at room temperature |
| Copernicium | 23,700 | Predicted, at room temperature |
| Roentgenium | 28,700 | Predicted, at room temperature |
| Dubnium | 29,300 | Predicted, at room temperature |
| Darmstadtum | 34,800 | Predicted, at room temperature |
| Seaborgium | 35,000 | Predicted, at room temperature |
| Bohrium | 37,100 | Predicted, at room temperature |
| Meitnerium | 37,400 | Predicted, at room temperature |
| Hassium | 40,700 | Predicted, at room temperature |
Density of materials at different temperatures
Air
| Temperature | Density (kg/m3) |
|---|---|
| +727 | 0.340 |
| +227 | 0.696 |
| +35 | 1.146 |
| +30 | 1.164 |
| +27 | 1.161 |
| +25 | 1.184 |
| +20 | 1.204 |
| +15 | 1.225 |
| +10 | 1.247 |
| +5 | 1.269 |
| 0 | 1.293 |
| -5 | 1.316 |
| -10 | 1.342 |
| -15 | 1.368 |
| -20 | 1.395 |
| -25 | 1.423 |
| -73 | 1.746 |
| -173 | 3.556 |
Hydrazine
| Temperature | Density (kg/m3) |
|---|---|
| +50 | 982 |
| +25 | 1,004 |
| +20 | 1,008.5 |
| +15 | 1,014 |
| 0 | 1,021 |
Water
| Temperature | Density (kg/m3) |
|---|---|
| +100 | 958.4 |
| +80 | 971.8 |
| +60 | 983.2 |
| +50 | 988.03 |
| +40 | 992.2 |
| +30 | 995.6502 |
| +25 | 997.0479 |
| +22 | 997.7735 |
| +20 | 998.2071 |
| +15 | 999.1026 |
| +10 | 999.7026 |
| +4 | 999.9720 |
| 0 | 999.8395 |
| -10 | 998.117 |
| -20 | 993.547 |
| -30 | 983.854 |
The values below 0 °C refer to supercooled water.
