Test #1

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nelms6678
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

Test #1

Postby nelms6678 » Mon Mar 12, 2018 10:22 pm

3a) A tank of liquefied propane is punctured, emitting gaseous propane vapors. Is heat being transferred?
-Is this process releasing heat because the substance is undergoing a phase change? (liquid-->gas)

Nicole 1F
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

Re: Test #1

Postby Nicole 1F » Mon Mar 12, 2018 10:33 pm

Yes, that is what I put as my explanation. I also said that it was an endothermic process.

Anna Okabe
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

Re: Test #1

Postby Anna Okabe » Tue Mar 13, 2018 4:20 pm

Yes, because going from liquid to gas, heat must be transferred, and looking at a heating curve I think heat is supplied because heat must be supplied for a liquid to turn into a gas.

Nicole Jacobs 1C
Posts: 59
Joined: Thu Jul 13, 2017 3:00 am

Re: Test #1

Postby Nicole Jacobs 1C » Sat Mar 17, 2018 10:51 am

if you were going from gas to liquid, then it would be exothermic because phase changes of vaporization and condensation are the opposite

Adriana Rangel 1A
Posts: 96
Joined: Fri Sep 29, 2017 7:04 am

Re: Test #1

Postby Adriana Rangel 1A » Sat Mar 17, 2018 10:57 am

^@Nicole No, phase changes such as vaporization and melting are endothermic ( you need to add heat to an ice cube in order for it to change phase to liquid) while freezing and condensation are exothermic (I remember it as think of a glass of water. If you somehow took out all the heat in the water it would become ice)


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