The boiling point of water
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At -0.1 MP, what is the boiling point of water? Thank you!
I guess it’s 175 degrees Celsius! ! I’m not sure if it’s right? ? This post was last edited by qthjb001 on 2009-4-2 17:08.]
Results of the Aspen simulation at 11.1 degrees Celsius,,,
Definition of boiling point: A liquid boils when its vapor pressure equals the external pressure, and the temperature at this point is called the boiling point. The -0.1 MPa mentioned by the poster refers to absolute zero, that is, a vacuum state with zero pressure; naturally, the boiling point is also 0 in such conditions. However, with current technology it’s not possible to achieve this, only to get as close as possible! ! !
It can only get infinitely close; I agree with the person above! !
I completely agree with your view. The results obtained using Aspen are also reasonable, but they are relative to a standard atmospheric pressure of 101.325 kPa. This represents an extremely high level of vacuum, one that is difficult to achieve.
Using Antoine’s formula: ln(P) = 9.3876 – 3826.36/(T – 45.47), where T is between 290 and 500 K. P is in MPa, and T is in K. t = T – 273.15. The values of T are: 373.1500, 383.1500, 393.1500, 403.1500, 413.1500, 423.1500, 433.1500, 443.1500, 453.1500, 463.1500, 473.1500. The corresponding values of P are: 0.1013, 0.1432, 0.1983, 0.2698, 0.3609, 0.4754, 0.6174, 0.7913, 1.0019, 1.2543, 1.5540