Problem: Two liquids, A and B, have vapor pressures at a given temperature of 24 mmHg and 36 mmHg, respectively. We prepare solutions of A and B at a given temperature and measure the total pressures above the solutions. We obtain the following data:SolutionAmt A (mol)Amt B (mol)P (mmHg)11130221283123241333Predict the total pressure above a solution of 1 mol  A and 5 mol B.

FREE Expert Solution
90% (415 ratings)
FREE Expert Solution

We’re being total pressure above a solution of 1 mol  A and 5 mol B.


Recall that the total pressure:

Ptotal=PA+PB


Partial Pressures are equal to:

PA=χA·PAPB=χB·PB

P=pure pressureχ=mole fraction


Mole fraction is given by:

90% (415 ratings)
Problem Details

Two liquids, A and B, have vapor pressures at a given temperature of 24 mmHg and 36 mmHg, respectively. We prepare solutions of A and B at a given temperature and measure the total pressures above the solutions. We obtain the following data:

SolutionAmt A (mol)Amt B (mol)P (mmHg)



11130221283123241333







Predict the total pressure above a solution of 1 mol  A and 5 mol B.

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Based on our data, we think this problem is relevant for Professor Brewster's class at MEMPHIS.