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steam latent heat

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Rick T
Rick T Member Posts: 16
in THE MAIN WALL
Why does the latent heat of vaporization of steam go down as the pressure increases? You would think it would take more energy to jump off the surface under more pressure.

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  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,528
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    because

    the boiling point of the water (sensible heat) goes up. If you add the two numbers together you'll see that there's really not that much more total BTU in higher-pressure steam than there is in lower-pressure steam. The temperature goes up significantly (for the purposes for which we use it - cooking, process, etc.) but the BTU content isn't that significant.
    Retired and loving it.
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