The molar enthalpy of vaporization of boron tribromide is, Ask an Expert

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The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and it's normal boiling point is 91degrees C. What is the vapor pressure of BBr3 at 34 degrees C. (R=8.314 kJ/mol)
A. 117. torr
B. 759. torr
C. 710. torr
D. 156. torr
E. 689. torr

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