<span>Iodine, I2, reacts with fluorine, F2, at room temperature to form the pentafluoride iodine(V) fluoride.
At 250°C the same reaction forms the heptafluoride iodine(VII) fluoride. With careful control of the reaction conditions, (-45°C, suspension in CFCl3), it is posible to isolate the trifluoride iodine(III) fluoride.
I2(s) + 5F2(g) → 2IF5(l) [colourless]
I2(g) + 7F2(g) → 2IF7(g) [colourless]
I2(s) + 3F2(g) → 2IF3(s) [yellow]</span>
The ideal gas law is: PV=nRT Pressure Volume n= moles R= gas constant Temperature in Kelvin (Degrees in celsius +273) n= PV/RT (1.00atm)(5.00L)/(.08026)(295K)= .207mol of gas
