brazerzkidaimmo.blogg.se - 23.8 mmhg to atm

However, not every question will ask you to find P1 or P2 - many will ask you to find a temperature value or even sometimes an ΔH vap value. In our example in Section 1, we saw that the Clausius-Clapeyron equation is very useful for finding the vapor pressures of pure substances. Rearrange the Clausius-Clapeyron equation to find other variables. Moles (sucrose): 1,056.7 grams × 1 mol/342.2965 g = 3.08 moles (note that you can find sucrose's molar mass from its chemical formula, C 12H 22O 11.).

To do this, we'll find the mass of each, then use the substance's molar masses to convert to moles.

Let's say that our recipe for simple syrup uses 1 liter (L) of water and 1 liter of sucrose (sugar.) In this case, we'll need to find the number of moles in each.

In other words, each component's mole fraction equals (moles of component)/(total number of moles in the substance.) Finding mole fractions is easy: just convert your components to moles, then find what percentage of the total number of moles in the substance each component occupies. The last thing we need to do before we can solve is to find the mole fraction of our solvent.