Question

A halogen gas mixture contained in a 8.0L cylinder holds 25.0g of Cl2 and 10.0g of F2. The temperature of the tank is 25 degree Celsius, what is the total pressure in the cylinder, in atmosphere?

Answer 1

Moles of $Cl_2=\frac{25}{71}=0.352$

Moles of $F_2=\frac{10}{19}=0.526$

Total moles$(n)=0.526+0.352=0.878$

$T=25\degree C=298K$

Using ideal gas equation,$PV=nRT\implies P\times 8=0.878\times 0.0821\times 298\implies$ $P=2.685\ atm$