Gas Stoichiometry

How many liters of chlorine gas are needed to react with excess sodium metal to yield 5.0 g of sodium chloride when T = 25oC and P = 0.95 atm?

2

2

excess

X L

5 g

1 mol NaCl

1 mol Cl2

22.4 L Cl2

x g Cl2  =  5 g NaCl

= 0.957 L Cl2

58.5 g NaCl

2 mol NaCl

1 mol Cl2

P1 x V1     T1

P2 x V2     T2

=

(1 atm) x (0.957 L)        (0.95 atm) x (V2)

273 K

298 K

V2  =  1.04 L