Problem: Use the vapor-pressure curve in the figure to estimate the boiling point of ethanol at an external pressure of 200 torr.

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Problem Details


A graph of vapor pressure in torr versus temperature in degrees Celsius shows curves for diethyl ether (normal boiling point 34.6 Celsius at 760 torr), ethanol (normal boiling point 78.3 Celsius at 760 torr), water (normal boiling point 100 Celsius at 760 torr), and ethylene glycol (no normal boiling point listed). The curve for diethyl ether has points (0, 200), (17, 400), (20, 450), (28, 600), (35, 800), (40, 1000). The curve for ethanol has points (0, 10), (20, 15), (40, 160), (48, 200), (60, 340), (64, 400), (72, 600), (80, 800), (82, 1000).

Use the vapor-pressure curve in the figure to estimate the boiling point of ethanol at an external pressure of 200 torr.

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