2006-08-16 07:23:04 · 6 answers · asked by Fadel A 1 in Science & Mathematics ➔ Physics
Yes.
Density is a property of matter.
It is a derived property. It is derived from two basic properties ; mass and volume. In other words density is mount matter occupied by a certain volume.
But you new that already. Didn't you?
2006-08-16 07:58:48 · answer #1 · answered by Edward 7 · 2⤊ 0⤋
No, you cannot say that!
Certainly not always!
For (ideal) gasses, the molar volume is 22,4 liter at 273,15 K at 1 atm
According to thermodynamics, volume (and thus density) is a natural dependent property of a system. This means it is a function of state, that can be determined by the temperature, the pressure (independant variables, because you can naturally control them) and composition, if you talk about a mixture.
The size of the system can be, according to chemical thermodynamics, been desribed as an additive property; if you calculate compositions in partial molar fractions, you can determine partial molar volume fractions. So basically, the volume of a system is the sum of partial molar volumes at equilibrium. These are dependant on T, P and composition and thus technically it is not an independant property. It is 'another property of matter in a certain standard condition' only.
Why this long explanation? To point out that more is in to play than only properties of matter. If you mix one liter of water and one liter of ethanol, you will have a total volume of less than 2 liters, due to arrangements in the liquid. If you have Iron or maybe even better Tin or Carbon, you can arrange that matter in different crystal structures an thus they have different densities. This is clearly dependant on the phase equilibrium you achieve, determined by temperature and pressure that you choose.
This is why hot air balloons fly, watertubes break when it is freezing and why you can skate on ice.
2006-08-16 19:39:07 · answer #2 · answered by Wouter G 2 · 0⤊ 0⤋
Actually it is a derived unit of measure of mass inside a volume. Density is by definition mass divided by volume.
Mass and volume have the intrinsic characteristics (properties). Density's characteristics are just derived from those of mass and volume.
For example, whenever you see density in an equation, you can separate out the mass and volume factors in that equation and still solve the equation (assuming you had the right data). In F = C 1/2 rho v^2 A, an equation for lift on an aircraft wing having area A and traveling at velocity v, rho is the density of the atmosphere. If you had the data, you could separate rho into M/V (atm mass over volume of air) and still find out how much lift there was on the wing.
2006-08-16 14:53:06 · answer #3 · answered by oldprof 7 · 2⤊ 0⤋
It is a physical property yes. This is how Archemedes determined that the Kings crown was not actually made of pure gold (as commanded) without actually damaging the crown itself. Archemedes weighed the crown in air and again under water and found the truth, the crown was not pure gold. Big trouble for the person commissioned to make the crown.
Of course, you have to assume standard conditions, such as STP on planet Earth. Densities of gasses can change if you change some of those variables from Standard Temperature and Pressure.
2006-08-16 14:48:16 · answer #4 · answered by SteveA8 6 · 0⤊ 1⤋
technically yes... It depends on mass though
2006-08-16 14:28:33 · answer #5 · answered by Anonymous · 0⤊ 1⤋
No. It is not a property.
2006-08-16 14:44:39 · answer #6 · answered by Dr M 5 · 0⤊ 0⤋