試題詳解

16. Consider the decomposition equation of a compound: C₅H₆O₃(g) C₂H₆(g) + 3CO(g). When a 5.63-g sample of pure C₅H₆O₃(g) was sealed into an otherwise empty 2.50-L flask and heated to 200℃, the pressure in the flask gradually rose to 1.63 atm and remained at that value. The K value for this reaction is .
(A) 3.89 × 10^-1
(B)6.74 × 10^-6
(C) 8.00 × 10^-2
(D) 4.00 × 10^-3
(E)1.20 × 10^-9