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The temperature, in Physics, means the measure of Kinetic Energy in a substance. When a substance is either heated or cooled, Kinetic Energy is either being added to taken away from the substance. When the amount of KE in the substance changes, the temperature change. However, when the substance is changing its state, because all the KE change in the substance is being used up to change the state, the temperature will not change. When the substance is changing state, the KE can be measured by calculating the heat of fusion and heat of vaporization.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoThe interesting part is that, for example, to change ice to water, you put in a lot of energy, but yet, the temperature doesn't change. What happens is that the energy is used up in something else - breaking the bonds between atoms. In other words, the heat gets converted into a kind of potential energy, rather than kinetic energy (kinetic energy would be reflected as a higher temperature).
Wiki User
∙ 11y agoBecause the temp produced during phase change is used for the conversion from one phase to another since it requires energy for phase change
Wiki User
∙ 12y agoBecause the energy is all being used to change the state of the substance and that does not have an impact on temperature.
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What happens to temperature when energy is added as heat?
Either the temperature will increase, or it will remain the same. In the latter case, there is a phase change, as when ice melts.
When heat flows from a hot object to a cold object the temperature of the cold object increases while the temperature of the hot object is what?
The temperature of the hot object will be reduced unless it is undergoing a phase change - in which case it may remain at the same temperature until the phase change is complete - and then drop in temperature if the cold object has not reached the same temperature.
Which is the phase change in which substance changes from a gas to liquid?
Phase change of gas to liquid is cooling and is named as 'Condensation'. At the same temperature if the phase change is from liquid to gas then it is boiling point. Correspondingly for liquid to solid it is freezing point And from from solid to liquid it is melting point.
What happens to an object temperature when it gets more thermal energy?
Either the object's temperature will increase - or, the object will undergo a phase change (for example, from solid to liquid), in which case the temperature will stay the same.
What is the phase in which substances change directly from a solid to a gas?
i would assume that sublimation,solid to gas,would be the same answer when going from a gas to a solid.
What happens to a substances temperature during a phase change?
stays the same
Does the temperature change while a phase chage is occurring?
No, the temperature does not change during a phase change. It remains constant until all the substance has undergone the phase change.
Sometimes heat energy is added but the temperature stays the same when is this?
During a phase change.
Which stays the same when a substance switches from liquid to gas?
During the phase change, the temperature stays the same.
Could a phase graph with little temperature increase and a lot of heat be the same as latent heat?
Yes. Strictly speaking there should be no temperature change during a phase change.
Did the temperature fluctuate while the is melting?
No. The temperature does not change during the melting process. All of the heat energy is used to break the bonds of the solid to form a liquid, i.e. the energy is used in the phase change, and thus is not used to raise the temperature.
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 phase change mean?
changes from one state to another without a change in chemical composition
Can molecules change phase and increase temperature at the same time?
Yes, it is possible.
What happens when heat is added to a system?
When heat is added to a system, the temperature increases, unless there is a phase change taking place. In that case, temperature remains the same, and the only observable difference is the phase change.
What rule can you state about the relationship between phase changes and temperature?
As the temperature increases, the phases change from having the slowest amount of molecules to having the fastest amount of molecules (solid-liquid-gas)
Which phase change temperatures are identical on the phase diagram?
The temperature for melting and freezing is the same. The temperature for vaporization (boiling) and condensation is also identical. Refer to the related link for a diagram that illustrates phase changes.
