The vapor pressure of methanol is 122.7 torr above 50mL ofmethanol in a 120 mL c

Question

The vapor pressure of methanol is 122.7 torr above 50mL ofmethanol in a 120 mL container at 25 oC. What is thevapor pressure of methanol if the volume of the methanol is changedto 100mL at the same conditions? A. 204.5torr           B. 245.4 torr      C. 61.4torr          D. 122.7torr          E. 73.6torr The vapor pressure of methanol is 122.7 torr above 50mL ofmethanol in a 120 mL container at 25 oC. What is thevapor pressure of methanol if the volume of the methanol is changedto 100mL at the same conditions? A. 204.5torr           B. 245.4 torr      C. 61.4torr          D. 122.7torr          E. 73.6torr

Explanation / Answer

Vapor pressure is the pressure of a vapor inthermodynamic equilibrium with its condensed phases in a closedcontainer. Since temperature is constant and the volume of the container isalso constant , the vapor pressure of the methanol is also constant. So the vapor pressure of methanol in the second case alsoconstant. Vapor pressure is the pressure of a vapor inthermodynamic equilibrium with its condensed phases in a closedcontainer. So the pressure is 122.7 torr So the answer is D. Modified: theory error.

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