1) Propane: [tex]CH_{3} -CH_{2}- CH_{3}[/tex]
Butane: [tex]CH_{3} -CH_{2} - CH_{2} -CH_{3}[/tex]
2) Butane: [tex]2C_{4} H_{10} + 13O_{2} --> 8CO_{2} + 10H_{2}O[/tex]
Propane: [tex]C_{3}H_{8} + 5O_{2} --> 3CO_{2} + 4H_{2}O[/tex]
3) a) M = 12 x 4 + 10 = 58 g/mol
n = C x V = 58 x 0.05 = 2,9 mol
n(C4H10) -2xmax = 0
-> xmax = n(C4H10)/2
= 2,9/2 = 1,45 mol
Pour le CO2 :
8xmax = 8 x 1,45 = 11.6 mol
n= m/M --> m =n x M = 11.6 x 44 = 510.4 g
b) M(C3H8 ) = 3 x 12 + 8 = 44 g/mol
n = C x V = 44 x 0.05 = 2,2 mol
n(C3H8) - xmax = 0
-> xmax = 2,2 mol
Pour le CO2:
3xmax = 3 x 2,2 = 6,6 mol
n= m/M --> m = n x M = 6,6 x 44 = 290,4 g
4) 510,4 + 290,4 = 800,8 g
