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What is happening to the molecules of a substance when they are heated or cooled?
Wiki User
∙ 13y ago
move faster when heated
they move slower when cooled
Wiki User
∙ 13y ago
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What happens when molicules are heated?
When molecules are heated they become more active. When they are cooled, the slow down.
When a pure substance is heated or cooled but does not change state the energy as heat is the what?
chemical change
How much energy is released when a substance is cooled to its original temperature?
It depends on it's original temperature and how much it was heated.
What changes over time with density?
density changes when the substance changes.
How do electrons help in transfer of heat energy?
when a substance is heated,the molecules in that substance get heat energy. we know that all of the molecule in the substance having electrons. when substance is heated. electrons becoming high energetic.and they move faster and also energy will propagate though out the substance
What happens to matter when it is heated or cooled?
It changes the vibrations of the molecules.
What happens when molicules are heated?
When molecules are heated they become more active. When they are cooled, the slow down.
Is the expansion of a substance due to heat?
YES, as far as I'm concerned, a substance expands when heated and contracts when cooled.
What does thermochromatic mean?
it refers to a substance undergoing a reversible change of colour when heated or cooled
When a pure substance is heated or cooled but does not change state the energy as heat is the what?
chemical change
What happen to the average energy of the molecules in a substance when it is heated?
They increase in energy.
When a substance is heated what is happening to its particles?
As temperature increases, particle motion increases proportionally.
What are your rocks and soil heated by?
Rocks and soil are heated by two things, atoms and molecules. when they get heated they vibrate and sends heat to other atoms or molecules in the same substance until the whole thing is heated. The energy comes from the sun, but the atoms and molecules really heat them.
What happen to a substance when it is heated?
The velocity of the atoms/molecules (that the substance is made of) increase.
How much energy is released when a substance is cooled to its original temperature?
It depends on it's original temperature and how much it was heated.
Why do substances expand when temperature is increased?
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.
What are two ways to change the state of a substance?
Substances can change state, usually when they are heated or cooled. For example, liquid water turns into steam when it is heated enough, and it turns into ice when it is cooled enough. The closeness, arrangement and motion of the particles in a substance change when it changes state.
