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Iron expands on heating due to an increase in the kinetic energy of its atoms, causing them to vibrate more and occupy a larger volume. This process does not alter the chemical composition of iron; it remains iron throughout the expansion. Since the change is reversible and does not produce a new substance, it is classified as a physical change.
Iron expands on heating because the increased thermal energy causes its atoms to vibrate more vigorously, leading to greater distances between them. This process is reversible; when the iron cools down, it contracts back to its original size without any change in its chemical composition. Since the substance remains iron throughout the process and no new substances are formed, this expansion is classified as a physical change.
No, the rate of heating and the rate of cooling of a substance are not necessarily equal. The rate of heating refers to how quickly a substance gains heat energy, while the rate of cooling refers to how quickly a substance loses heat energy. These rates can be different depending on factors like the material of the substance, the temperature gradient, and the presence of insulation.
it expands and it becomes bigger
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Matter typically expands when heated. This is because heating causes the atoms and molecules within a substance to vibrate more vigorously, leading to an increase in their average distance from each other. This results in an overall increase in volume or size of the material.
Iron expands on heating due to an increase in the kinetic energy of its atoms, causing them to vibrate more and occupy a larger volume. This process does not alter the chemical composition of iron; it remains iron throughout the expansion. Since the change is reversible and does not produce a new substance, it is classified as a physical change.
water
It expands.
we wont use copper as a heating element because it expands on heating and it can effect the thermostat
When you heat the jar, the glass expands only slightly while the metal expands much more. This is governed by the coefficient of expansion for the substance. The greater the coefficient of expansion, the more the substance expands. Since metal generally has a much higher coefficient of expansion, the lid of the jar will get bigger while the jar only expands slightly. That makes everything a little looser, which makes it much easier to open the jar.
compound as it decomposed into two separate things.
Air expands the most.
Heating a substance can result in a chemical reaction, which usually results in a simple combustion reaction. This is because Oxygen, or O2, is added to the substance, which can dramatically alter the substance.
The substance left after heating coal is coal ash. The substance left after heating petrol is a residue called coke. Both of these byproducts are typically composed of carbon and other elements.
YES, as far as I'm concerned, a substance expands when heated and contracts when cooled.