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When the temperature of a substance is increased, its molecules or atoms jiggle faster and move farther apart, on the average. The result is an expansion of the substance. With a few exceptions, all forms of matter--solids, liquids, gases, and plasmas--generally expand when they are heated and contract when they are cooled.
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What happens when the temperature of a substance decreases significantly A. Most substances will expand. B. Most substances will gain atoms. C. Most substances will contract. D. Most substances will d?
When the temperature of a substance decreases significantly most substances will contract.
Why do substances expand when thermal energy is increased?
Molecular movement or vibration is a fundamental result that occurs when energy is absorbed by an atom. The energy that is absorbed cannot just disappear; it causes the atom to increase its movement or vibration, and we perceive this as increased heat. Most substances do expand when heated, but not all do. This expansion is caused (in simple terms) by the atoms or molecules needing more "room" when they vibrate more at higher temperature. Not all substances expand when heated, though. For example, if you heat water at 0°C (32°F) it actually contracts until it reaches 4°C (39°F). Heating further does cause expansion. Similarly, some metal alloys contract when heated over a wide temperature range as a result of complex interactions in the metal's crystals.
Do cooled substances expand?
Yes
When substances get cooler they expand or contract?
Contract
Does a substance change density if it changes physically?
Depends on what you consider a physical change. Substances change their density when they change their state of matter. When the temperature rises, substances usually expand, wich leads to the density decreasing. When the temperature falls, substances contract, increasing the density. Exception would be water, as it shows an anomaly occurring near 273K
What happens when the temperature of a substance decreases significantly A. Most substances will expand. B. Most substances will gain atoms. C. Most substances will contract. D. Most substances will d?
When the temperature of a substance decreases significantly most substances will contract.
How will the density change if the temperature increased to 125?
The density of most substances will change if temperature is increased. The amount of change depends on the difference between the two temperatures.
Why do substances expand when thermal energy is increased?
Molecular movement or vibration is a fundamental result that occurs when energy is absorbed by an atom. The energy that is absorbed cannot just disappear; it causes the atom to increase its movement or vibration, and we perceive this as increased heat. Most substances do expand when heated, but not all do. This expansion is caused (in simple terms) by the atoms or molecules needing more "room" when they vibrate more at higher temperature. Not all substances expand when heated, though. For example, if you heat water at 0°C (32°F) it actually contracts until it reaches 4°C (39°F). Heating further does cause expansion. Similarly, some metal alloys contract when heated over a wide temperature range as a result of complex interactions in the metal's crystals.
What causes coke to expand when frozen?
It is the water in Coke that causes it to expand when frozen. Water, unlike most substances, expands as its temperature decreases, below a certain point. For an explanation, see = Why does water expand when it freezes? =
When do substances expand?
Yes.
Does sea water boil at higher temperature than tap water and why?
Yes. Dissolved substances increased the boiling point.
Do cooled substances expand?
Yes
Do substances expand on heating?
yes
Do substances expand when hot?
Yes.
When most substances are heated they....?
They expand
How does temperature affect permeability?
When the temperature rises, the molecules have increased kinetic energy which means that the phospholipids and other substances move around more, making the membrane more 'leaky' which means that substances that wouldn't usually do so can enter and leave the cell.
What do substances do when heated because of the molecules?
they expand
