Steam vs water

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Matthew Chan 1B
Posts: 111
Joined: Sat Sep 07, 2019 12:16 am

Steam vs water

Postby Matthew Chan 1B » Sun Jan 26, 2020 11:58 pm

Could someone explain the example that Lavelle went over with steam and why it has much more severe burns than liquid water?

Brian J Cheng 1I
Posts: 115
Joined: Thu Jul 11, 2019 12:15 am

Re: Steam vs water

Postby Brian J Cheng 1I » Mon Jan 27, 2020 12:27 am

Short answer: because steam has more phase changes than water, it releases more energy when it comes into contact with your skin. It transfers more energy to your skin resulting in greater damage.

MAC 4G
Posts: 121
Joined: Wed Sep 18, 2019 12:16 am

Re: Steam vs water

Postby MAC 4G » Mon Jan 27, 2020 12:50 am

Here's a more detailed answer: viewtopic.php?t=1844

Justin Quan 4I
Posts: 104
Joined: Sat Sep 14, 2019 12:17 am

Re: Steam vs water

Postby Justin Quan 4I » Mon Jan 27, 2020 8:34 am

Image
To clarify, when steam comes into contact with a cool surface such as your skin, it will undergo a phase change from vapor to liquid. As the steam is changing from gas to liquid, it will release all the heat absorbed that caused the phase change in the first place. If you look at the image above, the horizontal line labeled boiling is all the heat absorbed to change water from liquid to gas. If a gas returned back to the liquid state, it has to release all that heat, thus transferring more energy to your skin resulting in greater damage.

ALegala_2I
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

Re: Steam vs water

Postby ALegala_2I » Mon Jan 27, 2020 9:48 am

How does the delta H of water when it is melting compare to the delta H of water when it is vaporizing?

Kavya Immadisetty 2B
Posts: 106
Joined: Sat Aug 24, 2019 12:17 am
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Re: Steam vs water

Postby Kavya Immadisetty 2B » Mon Jan 27, 2020 10:14 am

Steam, despite being at the same temperature as water, has more energy because during a phase change, a substance can absorb energy without increasing in temperature. This excess energy is transferred to your skin and causes burns


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