Phase Changes

[Leslie Almaraz 4G]

phase changes occur at a constant temperature?

[Ashley Tran 2I]

Yes, during a phase change, the temperature doesn't change because the energy is channeled into breaking the intermolecular forces of the substance.

[Junwei Sun 4I]

That’s correct because during a phase change energy is used to overcome the intermolecular forced between molecules instead of raising the actual temperature of the substance.

[Nick Fiorentino 1E]

The temperature must be high enough to cause the phase change but not high enough to cause the system to change temperature

[Maya Pakulski 1D]

Yes, the temperature stays constant while the energy continues to increase.

[Orrin Zhong 4G]

Phase changes occur at constant temperature because the energy put into the system is breaking the intermolecular forces between the molecules rather than increasing the kinetic energy of the molecules.

[Bella Townsend]

If you look at a heating curve, the slanted lines represent the temperature increasing, and the flat lines represent the phase change where there is no change in temperature. For example, on the first straight line, the leftmost point represents solid water at 0 degrees celsius, and on the most right point of the first flat line represents 0 degrees celsius for liquid water.

[Sanjana Borle 2K]

Phase Changes occur when temperature is constant, and the temperature goes up as the entropy of the solution goes up; however it doesn't undergo a phase change at this time.

[Pablo 1K]

Yes it is constant because the energy is going towards breaking the forces of a molecule so that such a change can occur.

[HuyHa_2H]

Looking on a heating curve, as the temperature reaches a certain point, it will remain constant before increasing again. That constant temperature is where the phase change occurs.

[Rebekah Alfred 1J]

If you look at a heating curve, the slanted lines represent the temperature increasing, and the flat lines represent the phase change where there is no change in temperature. For example, on the first straight line, the leftmost point represents solid water at 0 degrees celsius, and on the most right point of the first flat line represents 0 degrees celsius for liquid water.

Here's a visual that goes along with Bella's explanation:

[Simon Dionson 4I]

Phase changes are constant to change intermolecular forces. Sloped lines can indicate heat capacities.

[Catherine Daye 1L]

Yes, because the energy from the temperature is used to break/create bonds between molecules for their phase change.

[Nuoya Jiang]

Yes, during phase change, the temperature remains constant, but latent heat is released or absorbed.

[Jessica Katzman 4F]

The temperature does not change during a phase change- for example, you can have both ice and water at the same temperature.

[Madelyn Romberg 1H]

Temperature does not change during a phase change. However, there is still energy being put into the system. The energy is going into breaking intermolecular bonds rather than thermal heat.

[Jesse Anderson-Ramirez 3I]

While a phase change is occurring the temperature is constant, but once the phase change is complete the temperature will continue to change.

[lauraxie2e]

yes the phase change occurs after temperature change