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

---

Definitions:

Required Rate

The minimum return an investor expects to achieve for the risk associated with a particular investment.

Annual Dividend

The total dividend payment a company distributes to its shareholders annually, usually derived from its profits.

Constant Dividend

A dividend policy by which a company pays out a fixed amount of dividend per share over time, regardless of the company's earnings fluctuations.