Gases

 

32) V = 456 mL          m = 3.18 g C3H8          R = 0.0821 L•atm•mol-1•K-1            T = 23°C     

      (a) PV = nRT = 3.18 g C3H8 * 1 mol C3H8/44.11 g C3H8 * 0.0821 L•atm•mol-1K-1 * 296 K/(456 mL * 1 L/103 mL)

            P = 3.84 atm

      (b) V1 = 456 mL              V2 = ?

            P1 = 3.84 atm            P2 = 1.00 atm

            T1 = 296 K                T2 = 273 K   

            P1V1/T1 = P2V2/T2

            V2 = 3.84 atm * 456 mL * 1 L/103 mL * 273 K/296 K/1.00 atm = 1.61 L

       (c) V1 = 456 mL             V2 = 456 mL

             P1 = 3.84 atm           P2 = ?

             T1 = 296 K               T2 = 130° F

             P1/ T1 =  P2/T2

             P2 = 3.84 atm * 5/9 * ((130-32) + 273)/296 K = 4.25 atm