Asample of freon-12 (cf2cl2) occupies 25.5 l at 298 k and 153.3 kpa. find it's volume at stp.

Data Given:
                                 P₁  =  153.3 kPa

                                 V₁  =  25.5 L

                                 T₁  =  298 K

                                 P₂  =  101.325 kPa

                                 V₂  = ?

                                 T₂  =  273 K
Solution:

Suppose the gas is acting Ideally, then According to Ideal Gas Equation,

                                 P₁ V₁ / T₁  =  P₂ V₂ / T₂
Solving for V₂,
                                 V₂  =  P₁ V₁ T₂ / T₁ P₂
Putting Values,

             V₂  =  (153.3 kPa × 25.5 L × 273 K) ÷ (298 K × 101.325 kPa)

             V₂  =  35.34 L

Result:
           35.34 L volume is occupied at STP.

The answer is c. 320 g