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What happens to molecules of a substance as it changes from a solid to a to a gas?
Molecules in a solid are tightly packed together, that's what makes it a solid. As it begins to change phase to liquid, usually as the result of some form of heat being applied, the molecules begin to move faster and roll past eachother and "flow"
Molecules in the gaseous state are moving at their fastest and will expand to fill the available space.
What else can I help you with?
What happens to molecules when a substance changes from liquid to a solid?
They start to get closer together
What happens at the melting of a substance?
The solid changes into a liquid
What happens to the molecules of a substance as it moves from a liquid to a solid?
use your book
What happens to a substance during changes between solid and I gas?
When a substance changes from a solid to a gas, called sublimation, it quickly becomes less dense.
What happens to the molecules as a solid melts?
As a substance melts, the molecules of the formerly-solid substance becomes less structured and drifts further apart.
What happens to the molecules of a substance as it moves from a liquid to a solid state?
use your book
What happens to the temperature of a substance as it changes from a solid to a liquid?
it heats up
What happens to heat energy when a substance changes from solid to liquid?
it melts
What happens as a solid changes to a gas what increases?
The movement of the molecules making up the solid increases.
What happens when a substance changes from a solid to a gas without becoming a liquid?
It sublimes
Does melting occur when a substance changes from a liquid to a solid?
This change in the state of matter (liquid to solid) is called freezing, not melting; it is a physical change, the chemical nature of the molecules is not changed.
When a substance changes from a solid to a gas what happens to the speed of the molecules?
When a substance changes from a solid to a gas, the speed of the molecules increases. In the gas phase, the molecules have more energy and move more freely compared to when they were in a solid state where they were tightly packed and vibrating in fixed positions.
