Is the mass/volume ratio of a substance a characteristic property with a constant value? Please explain
2006-09-25 12:03:35 · 3 answers · asked by TopSpin 5 in Science & Mathematics ➔ Chemistry
mass per unit volume is the definition of density.
under constant conditions, this ratio will be a constant. if you change some of the parameters of the substance in question, the ratio may change. for example, if you increase the temperature of water from 10C to 20C, the density will decrease. if you change the pressure, the density will change, etc.
2006-09-25 12:10:41 · answer #1 · answered by Anonymous · 2⤊ 0⤋
No, the volume of a substance can change by changes in temperature or pressure. Water, for example is its densest at about 4°C. The volume of a given amount of water will expand when heated or as it begins to crystallize when it freezes. But, its mass does not change.
The same with a gas. Its volume will vary according to temperature and pressure. When you get to the STP chapter, you will understand.
2006-09-25 19:20:05 · answer #2 · answered by Tom-PG 4 · 1⤊ 0⤋
Density is going to vary according to pressure and temperature. For example any gas which is going to take up less volume under pressure or when it is cooled but its mass will not change.
2006-09-25 19:15:04 · answer #3 · answered by InqChem 1 · 1⤊ 0⤋