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When a substance undergoes a phase change the molecules either order themselves or disperse themselves randomly. In a solid the molecules are unable to freely move in space. In liquid form they are able to move around in the space they occupy and in gas form they can move freely in any open area. In gas state the molecules will have more kinetic energy than liquid or solid, and liquid more than solid.
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∙ 14y ago
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∙ 12y agoThe temperature will either increase or decrease depending on how fast the atoms/ molecules are moving. If the molecules speed up (liquid --> gas), then the temperature will increase. If the molecules slow down (liquid --> solid) then the temperature will decrease.
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∙ 9y agoMatter exists as solids, liquids and gases. When a substance change phases, the molecules will change size coupled with the increase or decrease of heat energy.
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∙ 13y agoThey come closer, more ordered, e.g. in straight lines or vice versa
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∙ 13y agoIt changes phases. The substances molecules either speed up and expand or slow down and condense.
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∙ 12y agoeither absorbs or releases energy
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What happens to temperature during a phase change?
Temperature is constant during a phase change.
What kind of change is involved when you change solid water into liquid water?
Changing a substance from solid into a liquid is called a change of state or a change of phase. Melting is the name given to the change of state from a solid to a liquid.
The process of excess water vapor changing into liquid water when warm air cools?
Condensationis the change of the physical state of matter from gaseous phase into liquid phase, and is the reverse of evaporation. When the transition happens from the gaseous phase into the solid phase directly, the change is called deposition - the opposite of sublimation.
As heat is added to a substance undergoing a phase change the temperature remains constant because the energy is being used to?
Overcome intermolecular forces
Is the melting point of a substance considered a chemical property?
It just means that one liquid can be distinguished from another by its boiling point because it is a characteristic or property of that particular liquid.
What happens to gas when it contracts?
It undergoes phase change and becomes a liquid.
What do the lines on a phase diagram represent?
The lines show where a phase changes happens to a substance -
What phase change happens when something dissolves?
Dissolving a substance does not involve a phase change.
What happens to a gas when it reaches the condensing point?
It undergoes a phase change, and turns to liquid.
What happens to a gas when it reaches it condensation point?
It undergoes a phase change, and turns to liquid.
What happens when a substance changes from one state of matter to another?
It undergoes a phase change, such as when a solid (like frozen CO2) sublimates directly to a gas, or when water freezes to ice.
What is a gas to a liquid?
Liquid to a solid is: freezingLiquid to a gas is: condensationSolid to a liquid : is meltingGas to a liquid is: evaporation
When a substance undergoes a phase change it still has a definite A mass B shape C volume D temperature?
mass - the mass does not change
What doe condensing mean?
Condensing is when a substance undergoes a phase transition from the gas phase to the liquid phase.
When the physical state of a substance changes during a phase what happens to the temperature of the system?
The temperature remain constant during a change of phase.
What happens to a substance as it under goes a phase change?
A change from gas to liquid, from solid to liquid, from liquid to gas, etc.
What is the phase change in which substance change form a gas to aliquid?
Condensation is the phase change in which substance change form a gas to a liquid.
