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As heat is added to a substance undergoing a phase change. why does the temperature remain?
Wiki User
∙ 13y ago
Basically what it comes down to is the substance that is left behind during the phase change (say the liquid when it is changing to a vapor) has a lower internal energy than it had before the phase change started. To maintain the substance at its original temperature, an equivalent amount of energy must be added to make up for the loss of internal energy due to the phase change. (Conservation of Energy)The energy added in this case is heat, which in turn causes more molecules of the substance to change phases and lowers the internal energy & the process repeats. This is why the temperature remains constant as you add heat to a substance during a phase change. Once the phase change is completed the added heat will eventually cause the temperature to rise in the new phase of the substance.
Hope this explanation helps. It's kind of hard to explain without a basic knowledge of thermodynamics.
Wiki User
∙ 13y ago
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Do properties remain the same regardless of the amount of the substance?
Intensive properties remain the same with a change in the amount of a substance - for example: temperature and density Extensive properties do not remain the same with a change in the amount of a substance - for example: mass and volume
What happens to a substances temperature during a phase change?
stays the same
Think critically how can the temperature of a substance remain the same even if the substance is absorbing thermal energy?
It's particles could be the kind that dosen't scatter easily thus, making it harder to heat.
Which temperature change would cause the volume of a sample of an ideal gas to double when the pressure of the?
For the pressure to remain the same, the temperature would double if the volume also doubled.
DEFINITION OF SUBSTANCE?
Substance is any matter that exists around us. The properties of a substance remain same throughout.
Why the temperature remain constant altough heat is absorbed from surrounding?
That will not happen unless matter is undergoing a phase change and the temperature you are measuring is that of the matter undergoing the phase change.
Why does the temperature of body remain steady when the body is undergoing a change in state?
5620
Do properties remain the same regardless of the amount of the substance?
Intensive properties remain the same with a change in the amount of a substance - for example: temperature and density Extensive properties do not remain the same with a change in the amount of a substance - for example: mass and volume
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.
When a physical change in a sample occurs which does not change?
Substance in the material Remain the same
How can the temperature of substance remain the same even if the substance is absorbing thermal energy.?
For example, when ice is melting, the absorbed thermal energy is used to change the phase of the substance - a type of potential energy.
Why does the temperature of any substance remain constant during the change of a state?
because energy is required to break the intermolecular forces in the molecule
What does not change when a physical change in a sample occurs?
Substance in the material Remain the same
What happen to the temperature during phase change?
The temperature remain constant.
What happens to temperature as energy is added to a substance that is changing state?
The temperature remain constant during the phase changing.
Does water remain the same substance regardless of physical change?
Yes
Which variables must be kept constant for Boyle's law to hold?
The temperature must remain constant.
