2007-01-14 19:30:18 · 6 answers · asked by Yan 1 in Science & Mathematics ➔ Chemistry
Material expands and contracts under the influence of temperature. As they get hotter they generally expand (water is the big exception which is why ice floats) and the volume of a fixed mass of the substance increases.
Since density is mass divided by volume and we take a constant mass, increased temperature gives increased volume and reduced density.
2007-01-14 20:08:26 · answer #1 · answered by John B 4 · 0⤊ 0⤋
Most liquids when heated, will expand (increase in volume). Density is the Mass divided by a fixed unit of volume at a specific temperature. Water, for example, is at its maximum density and minimum volume at 4°C at standard atmospheric pressure. The density of water at this temperature is 1.0gram per mL (or cubic centimetre (cc)). (= 1.0kg/L and 1,000kg/m³). Heating does not change the mass of a liquid. An increase in volume (expansion) will therefore produce a Lower Density. Water at 30°C has a density of 0.9957g/mL (cc) = 995.7g/L and 995.7kg/m³)
2016-05-24 04:23:47 · answer #2 · answered by ? 4 · 0⤊ 0⤋
It is important to specify the temperature because of the volumetric expansion of liquids i.e there is increase in volume of liquids due to heating. As density=mass/volume, so the density of the liquids decrease with increase in temperature.
2007-01-15 01:05:53 · answer #3 · answered by pankaj 2 · 0⤊ 0⤋
because the density can be effected by the tempature of the liquid
2007-01-14 19:34:05 · answer #4 · answered by Jumpforthesky 2 · 1⤊ 0⤋
It takes on difference properties with different temps. Why do you think Ice floats.
2007-01-14 19:33:05 · answer #5 · answered by alwaysmoose 7 · 0⤊ 1⤋
thermal stability of liquids ...
2007-01-14 19:32:25 · answer #6 · answered by shukan i 2 · 0⤊ 0⤋