Question

Use the vapor pressure curves illustrated here to answer the questions that follow. (FIGURE CANNOT COPY) (a) What is the vapor pressure of ethanol, $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH},$ at $60^{\circ} \mathrm{C} ?$ (b) Considering only carbon disulfide $\left(\mathrm{CS}_{2}\right)$ and ethanol, which has the stronger intermolecular forces in the liquid state? (c) At what temperature does heptane $\left(\mathrm{C}_{7} \mathrm{H}_{16}\right)$ have a vapor pressure of $500 \mathrm{mm}$ Hg? (d) What are the approximate normal boiling points of each of the three substances? (e) At a pressure of $400 \mathrm{mm}$ Hg and a temperature of $70^{\circ} \mathrm{C},$ is each substance a liquid, a gas, or a mixture of liquid and gas?

          Use the vapor pressure curves illustrated here to answer the questions that follow.
(FIGURE CANNOT COPY)
(a) What is the vapor pressure of ethanol, $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH},$ at $60^{\circ} \mathrm{C} ?$
(b) Considering only carbon disulfide $\left(\mathrm{CS}_{2}\right)$ and ethanol, which has the stronger intermolecular forces in the liquid state?
(c) At what temperature does heptane $\left(\mathrm{C}_{7} \mathrm{H}_{16}\right)$ have a vapor pressure of $500 \mathrm{mm}$ Hg?
(d) What are the approximate normal boiling points of each of the three substances?
(e) At a pressure of $400 \mathrm{mm}$ Hg and a temperature of
$70^{\circ} \mathrm{C},$ is each substance a liquid, a gas, or a mixture of liquid and gas?

Added by Ines C.

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