A liquid mixture had 30 moles of A and 70 moles of B. The vapor pressure...

A liquid mixture had 30 moles of A and 70 moles of B. The vapor pressure of pure A is 790 torr and pure B is 630 torr. What is the pressure at which the mixture boils?

Expert Solution

A = moles of A/(moles of A+moles of B) = 30/(30+70) = 0.3

B = moles of B/(moles of A+moles of B) = 70/(30+70) = 0.7

vapor pressure of A in solution = A X pressure

= 0.3 X 790 = 237 torr

vapor pressure of B in solution = B X pressure

= 0.7 X 630 = 441 torr

Pressure of the mixture = 237 + 441 = 678 torr

queen_honey_blossom answered 2 years ago

At 300K, the vapor pressure of pure liquid A and liquid B are 37.33 kPa and...

At 300K, the vapor pressure of pure liquid A and liquid B are 37.33 kPa and 22.66 kPa respectively. If we mix 2 mol liquid A with 2 mol liquid B, the total vapor pressure above the solution is 50.66 kPa and the molar fraction of vapor A is 0.60. Assume the vapor is an ideal gas. Calculate (a) the activity of A and B in the solution (b) the Gibbs energy change of mixing ΔmixG (c) If the solution...

A mixture of ideal gases A (propane) and B (isopropanol) exist in a vapor-liquid equilibrium in...

A mixture of ideal gases A (propane) and B (isopropanol) exist in a vapor-liquid equilibrium in a constant temperature and pressure container. Originally, there is 1 mol A and 1 mol B. The mol fraction of A in the gas phase is 76% and 22% in the liquid phase. Gases A and B start to flow into the system at constant flow rates (at the same constant T and P). The flow rate of A is 3 mol/s. a. Calculate...

The vapor pressure of liquid benzene is 17.7 kPa at 30 ºC and 37.7 kPa at...

The vapor pressure of liquid benzene is 17.7 kPa at 30 ºC and 37.7 kPa at 50 ºC. a) Calculate the enthalpy of vaporization of benzene. b) Estimate the vapor pressure at 10 ºC [use your answer from part (a)]. c) Estimate the normal boiling point of benzene (use a vapor pressure of 1 bar and use the result from part (a)]

A mass of 5 kg of saturated liquid vapor mixture of water is contained in a...

A mass of 5 kg of saturated liquid vapor mixture of water is contained in a piston cylinder device at 100 kPa, initially 2 kg of water is in the liquid phase and the rest is in the vapor phase.Heat is now transferred to the water and the piston which is resting on a set of stops, starts moving when the pressure in side reaches 200 kPa, heat transfer continues until the total volume increases by 20%, determine a. the...

1. Obtain the equilibrium mole fractions (liquid and vapor) of a mixture of water, methanol and...

1. Obtain the equilibrium mole fractions (liquid and vapor) of a mixture of water, methanol and ethanol at 100 kPa and 70°C. You can assume the mixture is ideal. 2. Create one plot where the equilibrium mole fraction of benzene in the vapor phase is plotted against the equilibrium mole fraction of benzene in the liquid phase for three different pressures (0.2 bar, 0.6 bar and 1 bar). Comment on the effect of pressure on the relative volatility

Naphthalene, C10 H8 , melts at 80∘ C . If the vapor pressure of the liquid...

Naphthalene, C10 H8 , melts at 80∘ C . If the vapor pressure of the liquid is 10 mm at 85.8∘C and 40 mm at 119.3∘C , and that of the solid is 1mm at 52.6∘C , calculate a) Assuming the melting-point and triple-point temperatures are the same, calculate △H sublimation of the solid, and △H fusion .

Vapor pressure of a pure liquid lab experiment Why is the value of the heat of...

Vapor pressure of a pure liquid lab experiment Why is the value of the heat of vaporization for sucrose greater than water? comment on the effect of a non-electrolyte such as sucrose on the vapor pressure and delta vap H. What can be the possible systematic source of error in this experiment?

What is the total vapor pressure in atm of a solution created by combining 2.32 moles...

What is the total vapor pressure in atm of a solution created by combining 2.32 moles of toluene and 6.56 moles of benzene at 350K? At 350K Pvap, toluene = 0.33 atm and Pvap, benzene = 0.95 atm

A)What is the total vapor pressure in atm of a solution created by combining 4.43 moles...

A)What is the total vapor pressure in atm of a solution created by combining 4.43 moles of toluene and 5.38 moles of benzene at 350K? At 350K Pvap, toluene = 0.33 atm and Pvap, benzene = 0.95 atm B)What is the molar mass of a non-ionizing, non-volatile solid that when 10.4 g is dissolved in water to make 100.0 mL of solution creats a solution with an osmotic pressure of 6.07 atm at 25.0oC C)What is the freezing point of...

A mass of 3 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder...

A mass of 3 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 175 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase. An electrical heater is in operation, and the piston rises until it hits a set of stops, which are set at double the initial volume. Electrical heating continues until the pressure reaches 500 kPa. Determine (a) the initial and final temperatures,...

Question