Liquid Sodium Can Be Used as a Heat Transfer Fluid

question 1

Multiple Choice

Liquid sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633°C and 400.0 torr at 823°C. What is its heat of vaporization?

• A) 43.4 kJ/mol
• B) 52.5 kJ/mol
• C) 70.6 kJ/mol
• D) 1.00 × 10² kJ/mol
• E) 3.64 kJ/mol