Rate of effusion of LPG (a mixture of n-butanemole fraction of n-butane in LPG is

Question

Rate of effusion of LPG (a mixture of n-butanemole fraction of n-butane in LPG is (A) 0.75 (B) 0.25 (C) 0.50 (D) 0.67

Tardigrade Admin · Accepted Answer

r2/r1 = 1.25 M2 = ? . M1 = 32 + 16 × 3 = 80 (r2/r1)= √(M1/M2) ; 1.25 = √(80/M2) M2 = (80 × 16/25) = (1280/25) =51.2 Mol mass of C4H18 = 58 Mol mass of C3H8 = 44 Let mole fraction of C4H10 = x ∴ 58x + 44(1 -x ) = 51.2 58r - 44x = 51.2 - 44.0 14x = 7.2 x = (7.2/15) = 0.5

Q. Rate of effusion of LPG (a mixture of n-butanemole fraction of n-butane in LPG is

0.75

0.25

0.50

0.67