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These are phase changes - All the energy that is added at this time is used to change the phase of the substance.
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What happens to snow molecules during phase change?
The snow (solid) become water (liquid); the distances between molecules are decreased during the change of phase.
What happen to the ices molecules during this phase change?
The ice (solid) become water (liquid); the distances between molecules are decreased during the change of phase, also the attraction forces.
Where do molecules go when ice melts?
The melting of ice is a change of phase, from solid to liquid, a physical processus. The molecules of water (H2O) remain unchanged during the change of phase.
Are phase changes in matter permanent?
No. Water freezing into ice is a good example of a "phase change". Ice can melt back into water, so we know that the phase change is not permanent!
Is the amount of water the same after the solid ice change phase to its initial form as an ice water?
A phase change does NOT chance the total number of molecules. There will be some evaporation and sublimation too. During the time that ice melts there will some molecules that sublimate to water vapor and also some water molecules evaporate to vapor. But the total mass and number of molecules will not change.
When does the energy of water increase?
The energy of water can increase if it is heated up, if it is placed under more pressure, if it changes phase, or if it flows faster. In phase change, increase of water's energy happens from: solid phase to liquid phase (melting), from solid phase to vapor phase (sublimation), and from liquid phase to vapor phase (evaporation). Increase in altitude also increases its potential energy.
When water is heated the temp reaches a constant value and forms a plateau on the graph what does the plateau indicate?
It indicates that the temperature does not change during the phase change from liquid to gas until the change is complete. During the phase change, the heat energy added to the water goes into breaking hydrogen bonds between water molecules, so it does not cause an increase in temperature during that time.
What happens during a phase change as heat is added to a water sample?
As heat is added to a water sample during a phase change, all of that heat goes into changing the phase, say from solid ice, to liquid water, and as a consequence, the TEMPERATURE of the sampleDOES NOT CHANGE.
What happens to snow molecules during phase change?
The snow (solid) become water (liquid); the distances between molecules are decreased during the change of phase.
What happen to the ices molecules during this phase change?
The ice (solid) become water (liquid); the distances between molecules are decreased during the change of phase, also the attraction forces.
What type of change occur when water changes from a solid to a liquid?
its a phase change
What happens to temperature after a phase change?
the temperature will change because if you freeze water it becomes colder when you melt ice it become hotter. so basically you cant have the temp. not change during a phase change.
When water changes into water vapor it is called what?
When water turns into water vapor it goes through a phase change. The water uses all the energy gained not to increase heat, but turn into a gas. The name for this phase change is evaporation, or vaporization.
Is it possible to apply thermal energy to an object and the temperature not increase?
Oh yes, that is possible. Thermal energy can cause a change of phase, during which the temperature does not increase. So when water boils, it remains at 100o Celsius until it is all boiled away.
Is energy required for each phase change?
Yes energy reqired during each phase change process. solid to liquid(water) = 333.7 Kj/kg liquid to vapour(water) =2257.1Kj/kg
Where do molecules go when ice melts?
The melting of ice is a change of phase, from solid to liquid, a physical processus. The molecules of water (H2O) remain unchanged during the change of phase.
What is a phase change example of?
When ice melts and becomes water, that is a phase change. Same when water boils and becomes steam (a gas) that is also a phase change.
