steam at 100ºC burn worse

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Cynthia Ulloa
Posts: 52
Joined: Fri Feb 23, 2018 3:02 am

steam at 100ºC burn worse

Postby Cynthia Ulloa » Thu Mar 14, 2019 12:14 am

Why does steam at 100ºC cause a worse burn than boiling water at 100ºC?

Ethan Breaux 2F
Posts: 63
Joined: Sat Sep 29, 2018 12:16 am

Re: steam at 100ºC burn worse

Postby Ethan Breaux 2F » Thu Mar 14, 2019 12:57 am

because it holds more energy since it has the heat energy of boiling water + the heat energy required for the phase change

CHEM 14B Lover
Posts: 33
Joined: Fri Sep 28, 2018 12:19 am

Re: steam at 100ºC burn worse

Postby CHEM 14B Lover » Thu Mar 14, 2019 2:33 pm

This also assumes that the number of water and steam particles are equal. Don't intuit that steam burns less because typically when you put your hadn in 100C water your hand is in contact with a lot more molecules than if you had your hand above the steam from boiling water.

Eva Zhao 4I
Posts: 101
Joined: Sun Sep 29, 2019 12:16 am

Re: steam at 100ºC burn worse

Postby Eva Zhao 4I » Mon Jan 27, 2020 1:16 pm

To help clarify with the help of the water heating curve, you can see in the diagram that it takes much more energy for liquid water to transition to steam than for ice to transition to liquid water. Thus, steam at 100ºC holds more energy than liquid water at 100ºC, causing worse burns.

Image

Chantel_2I
Posts: 109
Joined: Sat Sep 07, 2019 12:19 am

Re: steam at 100ºC burn worse

Postby Chantel_2I » Mon Jan 27, 2020 4:32 pm

When the vapor touches your hand, it undergoes a phase change to become liquid on your hand, therefore releasing even more energy in the form of heat. However, when boiling water touches your hand, it does not have that extra energy to release because it is already in the liquid phase.

Areli C 1L
Posts: 95
Joined: Wed Nov 14, 2018 12:19 am

Re: steam at 100ºC burn worse

Postby Areli C 1L » Tue Jan 28, 2020 9:34 pm

As Ally Huang answered in another similar question, "At 100 degrees celsius, steam will produce a worse burn than boiling water because steam contains more heat energy than boiling water. It holds more energy than boiling water because it has the heat energy of boiling water and the heat energy that was required for the phase change from liquid to vapor."
So basically, the Water vapor holds more heat energy than the boiling water because in order to transition from a liquid to vapor,it requires much more energy than transitioning a solid to a liquid. (Specifically in this case water). I hope that helps.

Elizabeth Harty 1A
Posts: 125
Joined: Sat Jul 20, 2019 12:16 am

Re: steam at 100ºC burn worse

Postby Elizabeth Harty 1A » Tue Jan 28, 2020 10:24 pm

it has more energy bc it has the energy of boiling water and the energy needs to transition from vapor to liquid (as it touches you)

Minh Ngo 4G
Posts: 137
Joined: Thu Jul 25, 2019 12:17 am

Re: steam at 100ºC burn worse

Postby Minh Ngo 4G » Tue Jan 28, 2020 11:38 pm

Because the energy it takes for liquid to become steam require more energy. So when the steam touch your skin, the steam has to condensate, meaning turns back into liquid phase and when it does that, it releases all the energy


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