Steam?

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Kayli Choy 2F
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Steam?

Postby Kayli Choy 2F » Thu Jan 23, 2020 2:26 pm

Could someone explain why steam is so hot and carries more heat than boiled water? I know it might have something to do with the specific heat of vaporization.

Thank you!

005324438
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

Re: Steam?

Postby 005324438 » Thu Jan 23, 2020 2:42 pm

When heating up a material, the energy can go into two places, increasing the temperature (specific heat), or changing the phase (heat of vaporization). Steam may not be more hot compared to boiling water if they are both 100ºC, but it will be carrying more energy because of the energy input in order to change the phase. This energy can be released without changing the temperature of the steam, but it will turn into water.

Justin Seok 2A
Posts: 104
Joined: Sat Aug 24, 2019 12:15 am

Re: Steam?

Postby Justin Seok 2A » Thu Jan 23, 2020 3:04 pm

Essentially steam carries more energy as it takes a lot of energy to transition from liquid to vapor. So while they may have the same temperature, steam will very likely have a higher heat content due to the heat of vaporization as you mention.

Andrew Liang 1I
Posts: 105
Joined: Fri Aug 30, 2019 12:18 am

Re: Steam?

Postby Andrew Liang 1I » Thu Jan 23, 2020 3:27 pm

Steam has a lot of energy compared to liquid water because of its high vaporization energy. Liquid water needs to obtain a lot of energy in order for it to break the bonds and change phases from liquid to gas

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

Re: Steam?

Postby Eva Zhao 4I » Mon Jan 27, 2020 1:05 pm

For a more visual representation through the heating curve of water, you can see that transitioning from liquid to vapor requires a lot more energy than it does from solid to liquid. Thus, steam carries more heat than boiled water.

Image

Mitchell Koss 4G
Posts: 128
Joined: Sat Jul 20, 2019 12:17 am

Re: Steam?

Postby Mitchell Koss 4G » Mon Jan 27, 2020 10:12 pm

It takes longer to break the final bonds so steam burns more

Jainam Shah 4I
Posts: 130
Joined: Fri Aug 30, 2019 12:16 am

Re: Steam?

Postby Jainam Shah 4I » Tue Jan 28, 2020 12:05 am

The energy needed to from boiling water to steam is quite high. While steam and boiling water may not have a considerable difference in temperature when the steam cools down it will release a lot of energy as it condenses, because when the steam was formed it needed a lot of energy. When that steam condenses onto your skin it burns more severely, because its releasing a lot of energy.

005162902
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

Re: Steam?

Postby 005162902 » Mon Feb 03, 2020 5:43 pm

will steam be on the midterm? and if so what should we know about it??? All I know is man that stuff burns lol

Chris Charton 1B
Posts: 69
Joined: Mon Jun 17, 2019 7:23 am

Re: Steam?

Postby Chris Charton 1B » Mon Feb 03, 2020 6:24 pm

In order to break the hydrogen bonds found in liquid water, quite a bit of additional energy is required to be added to change water's phase from liquid to gas. This energy stays with the vaporized water molecules and it is released when it condenses back to liquid.


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