הבדלים בין גרסאות בדף "חוק הנרי"

הוסרו 551 בתים ,  לפני 11 שנים
:''R'' [[קבוע הגזים]]
 
==חוק הנרי לעומת חוק ראול==
עבור תמיסה מהולה, ריכוז המומס יחסי בקירוב לשבר המולי שלו ''x'', וניתן לכתוב את חוק הנרי כך:
:<math>p = k_{\rm H}\,x</math>
ניתן להשוות זאת עם [[חוק ראול]]:
:<math>p = p^\star\,x</math>
כאשר ''p''* הוא לחץ האדים של המרכיב הטהור.
 
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==Henry's law in geophysics==
 
In [[geophysics]], a version of Henry's law applies to the solubility of a [[noble gas]] in contact with [[silicate]] melt. One equation used is
:<math>C_{\rm melt}/C_{\rm gas} = \exp\left[-\beta(\mu^{\rm E}_{\rm melt} - \mu^{\rm E}_{\rm gas})\right]\,</math>
 
where:
:''C'' = the [[number concentration]]s of the solute gas in the melt and gas phases
:''β'' = 1/''k''<sub>B</sub>''T'', an inverse temperature scale: ''k''<sub>B</sub> = the [[Boltzmann constant]]
:''µ''<sup>E</sup> = the excess [[chemical potential]]s of the solute gas in the two phases.
 
==Henry's law versus Raoult's law==
For a dilute solution, the concentration of the solute is approximately proportional to its [[mole fraction]] ''x'', and Henry's law can be written as:
:<math>p = k_{\rm H}\,x</math>
This can be compared with [[Raoult's law]]:
:<math>p = p^\star\,x</math>
where ''p''* is the vapor pressure of the pure component.
 
At first sight, Raoult's law appears to be a special case of Henry's law where ''k''<sub>H</sub>&nbsp;= ''p''*. This is true for pairs of closely related substances, such as [[benzene]] and [[toluene]], which obey Raoult's law over the entire composition range: such mixtures are called "ideal mixtures".