Phase Changes

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Leslie Almaraz 4G
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Joined: Fri Aug 02, 2019 12:16 am

Phase Changes

Postby Leslie Almaraz 4G » Fri Jan 31, 2020 12:31 pm

phase changes occur at a constant temperature?

Ashley Tran 2I
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Joined: Thu Jul 11, 2019 12:17 am

Re: Phase Changes

Postby Ashley Tran 2I » Fri Jan 31, 2020 12:32 pm

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
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Joined: Wed Oct 02, 2019 12:16 am

Re: Phase Changes

Postby Junwei Sun 4I » Fri Jan 31, 2020 1:07 pm

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
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Re: Phase Changes

Postby Nick Fiorentino 1E » Fri Jan 31, 2020 7:04 pm

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
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Re: Phase Changes

Postby Maya Pakulski 1D » Fri Jan 31, 2020 7:04 pm

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

Orrin Zhong 4G
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Re: Phase Changes

Postby Orrin Zhong 4G » Fri Jan 31, 2020 7:49 pm

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
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Re: Phase Changes

Postby Bella Townsend » Fri Jan 31, 2020 8:54 pm

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
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Joined: Fri Aug 09, 2019 12:15 am

Re: Phase Changes

Postby Sanjana Borle 2K » Fri Jan 31, 2020 9:39 pm

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
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Re: Phase Changes

Postby Pablo 1K » Fri Jan 31, 2020 9:39 pm

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
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Joined: Wed Sep 11, 2019 12:15 am

Re: Phase Changes

Postby HuyHa_2H » Sat Feb 01, 2020 2:27 am

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
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Re: Phase Changes

Postby Rebekah Alfred 1J » Sat Feb 01, 2020 12:17 pm

Bella Townsend wrote: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:
Image

Simon Dionson 4I
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Re: Phase Changes

Postby Simon Dionson 4I » Sat Feb 01, 2020 12:53 pm

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

Catherine Daye 1L
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Re: Phase Changes

Postby Catherine Daye 1L » Sat Feb 01, 2020 3:03 pm

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

Nuoya Jiang
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Joined: Sat Sep 14, 2019 12:17 am

Re: Phase Changes

Postby Nuoya Jiang » Sat Feb 01, 2020 3:24 pm

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

Jessica Katzman 4F
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Re: Phase Changes

Postby Jessica Katzman 4F » Sat Feb 01, 2020 5:01 pm

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
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Joined: Tue Oct 02, 2018 12:16 am

Re: Phase Changes

Postby Madelyn Romberg 1H » Sat Feb 01, 2020 6:38 pm

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
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Joined: Thu Sep 26, 2019 12:18 am

Re: Phase Changes

Postby Jesse Anderson-Ramirez 3I » Sun Feb 02, 2020 3:57 pm

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

lauraxie2e
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Joined: Fri Aug 09, 2019 12:17 am

Re: Phase Changes

Postby lauraxie2e » Sun Feb 02, 2020 4:04 pm

yes the phase change occurs after temperature change


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