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Thermal expansion is the tendency of matter to change in volume in response to change in temperature. During thermal expansion, the density of a substance decreases as its volume increases. Volume is the space occupied by a body. So, when a substance expands on heating, it will occupy more space or will have more volume. But its mass does not change because the amount of matter contained in a body cannot change. Therefore, mass divided by increased volume gives a decreased density.

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12y ago
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14y ago

It increases.

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Q: During thermal expansion what happens to the density of a substance?
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What happens to density during thermal expansion?

Higher the temperature the lower the density


What happens to density of a substance during thermal expansion?

Thermal expansion is the tendency of matter to change in volume in response to change in temperature. During thermal expansion, the density of a substance decreases as its volume increases. Volume is the space occupied by a body. So, when a substance expands on heating, it will occupy more space or will have more volume. But its mass does not change because the amount of matter contained in a body cannot change. Therefore, mass divided by increased volume gives a decreased density.


What happens to the density of the substance during thermal expansion?

Thermal expansion is the tendency of matter to change in volume in response to change in temperature. During thermal expansion, the density of a substance decreases as its volume increases. Volume is the space occupied by a body. So, when a substance expands on heating, it will occupy more space or will have more volume. But its mass does not change because the amount of matter contained in a body cannot change. Therefore, mass divided by increased volume gives a decreased density.


What is the relationship density and temperature?

Due to thermal expansion, as temperature increases, density decreases.There is no simple relationship. Usually, but not always, if a substance is heated, it will expand, thus decreasing its density.


What are 6 physical properties a physical substance may posses?

Examples: density, thermal conductivity, electrical resistivity, thermal expansion, ductility, malleability, hardness etc.


What is the increase of the volume of a substance by the increase of temperature called?

This increase of volume is called expansion


What is an increase in the size of a substance in response to an increase in the substance's temperature?

boyles law describes how when temperature rises the volume rises


What substance is an anomaly to the law thermal expansion?

Ice


What is thermal expanison?

Thermal Expansion is the increase in volume of a substance due to an increase in temperature.


Why does the density is affected by the temperature?

thermal expansion between particles


What is the scientific name for the inrease in the size of a substance when the temperature is increased?

Thermal Expansion. Each liquid or pure solid has a specific thermal of expansion. The thermal expansion of a substance is not linear, though for most of the temperatures we encounter in normal life, it is close enough to linear to be able to use a linear definition called the "Coefficient of Thermal Expansion".


What do you call the properties depend on the nature of a substance?

These are just the characteristics of that particular material. Such things as density, thermal expansion, velocity of sound, melting and freezing point and so on.