Slider A is currently locked as the pivot. Slider B is currently locked as the pivot. Slider C is currently locked as the pivot.
A
Observed Boiling Point at Pressure "P" (mmHg)
B
Boiling Point Corrected
at 1 atm (760 mmHg)
at 1 atm (760 mmHg)
C
Pressure "P" (mmHg)
1 atm = 760 mmHg
1 atm = 760 mmHg
Estimate Boiling Point and Vapor Pressure
使用上面的互動式控制來簡化計算，並提高您蒸餾或蒸發需求的效率。
我們的壓力-溫度 Nomograph 工具是 Clausius-Clapeyron 方程的應用，它假定汽化熱在壓力範圍內是一個常數。
以五種壓力單位（大氣壓、巴、千帕斯卡、磅每平方英寸或毫米水銀）和五種溫度單位（攝氏度、開爾文、華氏度、朗肯或雷姆）中的任一單位輸入壓力和溫度。
| Clausius-Clapeyron Equation (Relation)1 | Integration of the Clausius-Clapeyron Equation2 | Antoine Equation3 |
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| The standard version of the Clausius-Clapeyron equation was derived by Rudolf Clausius in 1850. The relation can be written in many different derivations from the state postulate to achieve an equation for use in phase transition calculations. The relation describes the slope of a plot of temperature against pressure. The slope is equal to the change in specific entropy divided by the change in specific volume. |
The integration of the Clausius-Clapeyron equation is usually used for calculating the vapor pressure at a new temperature, given the current or original temperature. The ΔHvap is the enthalpy of vaporization; R is the gas constant. This integration assumes that the molar enthalpy of vaporization does not vary with temperature over the integration limits. |
In the Antoine Equation, P is equal to vapor pressure, and T is temperature. The Antoine parameters A, B, and C are determined independently for each vapor pressure-temperature experiment. |
References
- McQuarrie, D. A.; Simon, J. D. Mathematics for Physical Chemistry.University Science Books; 2008.
- Goodman, J. M.; Kirby, P. D.; Haustedt, L.O. Tetrahedron Letters. 2000.41, 9879-9882.
- Thomson, G. W. Chemical Reviews. 1946.38 (1), 1-29.
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