Ethyl alcohol has a vapor pressure of 28.4 mm hg at 13.0°c and a normal boiling point of 78.4°c.
b) estimate the vapor pressure at 55.0°c using the clausius–clapeyron equation and the two given data points.
entry field with incorrect answer mm hg
c)
estimate the vapor pressure at 55.0°c using linear interpolation between the two given points.
d)
if one takes the antoine-equation estimate as the most reliable, by how much do the other two estimates deviate from the best estimate? take the magnitude of the percentage difference.
clausius-clapeyron %
linear interpolation %

first, consult an activity series chart to determine if al is more reactive than fe. it is, so it will replace the fe. now, one can continue with the problem.

next, make sure you have a correctly balanced equation.

3feo + 2al ==> 3fe + al2o3

now, determine which reactant (feo or al) is in limiting supply.

moles feo present = 125 g x 1 mole/71.8 g = 1.74 moles

moles al present = 25.0 g x 1 mole/26.98 g = 0.927 moles

since from the balanced equation, it take 3 mol feo for every 2 mol al, al will be limiting.

you can determine this simply by dividing moles of each by their coefficient in the balanced equation. for example: 1.74/3 = 0.58 and 0.927/2 = 0.464. al is less, so it is limiting.

finally, using the stoichiometry in the balanced eq. determine mass of fe that can be produced from 0.927 moles of al.

0.927 moles al x 3 moles fe/2 moles al x 55.8 g/mole = 77.6 g