Solid Iodine Has a Vapor Pressure of 1

question 139

Multiple Choice

Solid iodine has a vapor pressure of 1.0 mmHg at 39°C.How many moles of iodine will sublime into a 500.mL flask at this temperature? If the volume of the flask is doubled at constant temperature, what will happen to the equilibrium vapor pressure of I₂? (Assume some solid I₂ is always present in the container.)

• A)2.1 × 10^-4 mol; vapor pressure increases
• B)2.0 × 10^-2 mol; vapor pressure increases
• C)2.6 × 10^-5 mol; no change in vapor pressure
• D)2.1 × 10^-4 mol; no change in vapor pressure
• E)2.6 × 10^-5 mol; vapor pressure decreases

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