Solid Iodine Has a Vapor Pressure of 1

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