1-propanol (n-propanol), and 2-propanol (isopropanol), form ideal solutions in a
ID: 939067 • Letter: 1
Question
1-propanol (n-propanol), and 2-propanol (isopropanol), form ideal solutions in all proportions. Calculate the partial pressure of each component in equilibrium at 25 °C with a solution of the following mole fractions; xprop = 0.278, 0.556, and 0.834, given that P°prop = 20.9 Torr and P°iso = 45.2 Torr at 25 °C. Calculate the mole fractions (y) of the vapor phases as well.
ropanol (n-propanol), and 2-propanol (isopropanol), form ideal solutions in all proportions. Calculate the 0.278, 0.556, and 0.834, given that Poprop-20.9 Torr and Piso-452 Torr at 25°C. Calculate the mole At xprop = 0.556 partial pressure of each component in equilibrium at 25°C with a solution of the following mole fractions, xprop fractions (y) of the vapor phases as well At Xpro,-0.278 At xprop = 0.834 Number Number Number Torr Torr Torr Number Number Number Torr Torr Torr ISo Number Number Number prop Number Number Number isoExplanation / Answer
The mole fraction of isopropanol in a mixture of isopropanol and propanol will be 1 - the mole fraction of propanol.
The partial pressure of isopropanol will be its mole fraction multiplied by vapor pressure of isopropanol
The partial pressure of propanol will be its mole fraction multiplied by vapor pressure of propanol
In the vapor, the mole fraction of prop will be its partial pressure divided by the sum of the two partial pressures
When xprop = 0.278; xisopropanol will be 1- 0.278 = 0.722
P°iso = 45.2 Torr at 25 °C so
Piso will be 45.2 x 0.722 = 32.63 TORR
Pprop will be 20.9 x 0.278 = 5.81 TORR
yprop = 5.81/(5.81 +32.63) = 0.151
yiso = 1-0.1511 = 0.849
When xprop = 0.556; xisopropanol will be 1- 0.556 = 0.444
P°iso = 45.2 Torr at 25 °C so
Piso will be 45.2 x 0.444 = 20.07 TORR
Pprop will be 20.9 x 0.556 = 11.62 TORR
yprop = 11.62/(11.62+20.07) = 0.367
yiso = 1-0.1511 = 0.633
When xprop = 0.834; xisopropanol will be 1- 0.834 = 0.166
P°iso = 45.2 Torr at 25 °C so
Piso will be 45.2 x 0.166 = 7.50 TORR
Pprop will be 20.9 x 0.834 = 17.43 TORR
yprop = 17.43/(17.43 +7.50) = 0.699
yiso = 1-0.699 = 0.301
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