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**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

###### FREE Expert Solution

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

Recall that the **total pressure**:

$\overline{){{\mathbf{P}}}_{{\mathbf{total}}}{\mathbf{=}}{{\mathbf{P}}}_{{\mathbf{A}}}{\mathbf{+}}{{\mathbf{P}}}_{{\mathbf{B}}}}$

**Partial Pressures** are equal to:

$\overline{){{\mathbf{P}}}_{{\mathbf{A}}}{\mathbf{=}}{{\mathbf{\chi}}}_{{\mathbf{A}}}{\mathbf{\xb7}}\stackrel{\mathbf{\circ}}{{\mathbf{P}}_{\mathbf{A}}}}\phantom{\rule{0ex}{0ex}}\overline{){{\mathbf{P}}}_{{\mathbf{B}}}{\mathbf{=}}{{\mathbf{\chi}}}_{{\mathbf{B}}}{\mathbf{\xb7}}\stackrel{\mathbf{\circ}}{{\mathbf{P}}_{\mathbf{B}}}}$

$\stackrel{\mathbf{\circ}}{\mathbf{P}}\mathbf{=}\mathbf{pure}\mathbf{}\mathbf{pressure}\phantom{\rule{0ex}{0ex}}\mathbf{\chi}\mathbf{=}\mathbf{mole}\mathbf{}\mathbf{fraction}$

**Mole fraction** is given by:

###### 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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