900 700 Carbon disulfide E 600 E u 500 E 400 300 8 200 100 Ethanol Heptane 10 20
ID: 716396 • Letter: 9
Question
900 700 Carbon disulfide E 600 E u 500 E 400 300 8 200 100 Ethanol Heptane 10 20 30 40 50 60 70 80 90 100 110 Temperature (°c) 13) Based on the figure above, at what pressure would the boiling point of heptane be 50 °c? A) 605 mm Hg B) 220 mm Hg C) 152 mm Hg D) 40 mm Hg 14) Dissolving can be defined as A) rate of dissolution = rate of deposition B) rate of dissolution rate of deposition D) rate of bubbling> rate of absorbing Partial credit will be given for the following questions. All answers must have the proper units and be given with the correct number of significant d point. You may use an extra sheet of paper to show your work igits. A correet answer with no work shown will receive 1 15) (6 pts) Assuming ideal behavior, what would be the total vapor pressure at 25.0 °C of a solution consisting of 56 g of benzene (MW 78.11 g/mol, vapor pressure- 95.1 torr) and 88 g of toluene (MW 94.16 g/mol, vapor pressure 28.4 torr)?Explanation / Answer
Ans 13 : C) 152 mmHg
The boiling point of a liquid is the temperature at which the vapor pressure of the liquid is equal to the atmospheric pressure.
At this temperature , the physical state of the substance changes from liquid state to its gaseous state.
So here , in the graph , the pressure of heptane at 50oC will be 152 mmHg.
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