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Questions about pressure and boiling point

2017-01-01View Original

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Is the temperature corresponding to the saturated vapor pressure the boiling point? For example, if the saturated steam temperature corresponding to a gauge pressure of 0.3 Mpa is 143, then at an atmospheric pressure of 0.1 Mpa, is the boiling point still 143 when the gauge pressure is 0.3 Mpa?
Reply #22017-01-01
At an atmospheric pressure of 0.1 Mpa, the boiling point at a gauge pressure of 0.3 Mpa is 143. The boiling point corresponds to a saturated vapor pressure that does not match atmospheric pressure
Reply #32017-01-02
In other words, is the saturation steam temperature corresponding to the saturated vapor pressure the boiling point?
Reply #42017-01-02
1. The so-called boiling point generally refers to the temperature at which a substance vaporizes under normal pressure (absolute pressure of 1 atmosphere, relative pressure of 0). For example, water has a boiling point of 100°C, which refers to the temperature at which it vaporizes under standard pressure. 2. The boiling point corresponds to the saturated vapor pressure. For example, for water, at 100°C the saturated vapor pressure is 0.101325 MPa (absolute pressure), while at 50°C it is 0.0123518147 MPa (absolute pressure). This value can be calculated using software
Reply #52017-01-02
Mm-hmm, thank you. Which software can be used?
Reply #62017-01-02
Using absolute pressure is appropriate, as atmospheric pressure varies from place to place.

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