The Molar Enthalpy of Vaporization of Boron Tribromide Is 30

question 57

Multiple Choice

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91°C. What is the vapor pressure of BBr₃ at 20.°C? (R = 8.314 J/K • mol)

• A) 11.5 torr
• B) 659 torr
• C) 255 torr
• D) 66.2 torr
• E) 167 torr

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