Mechanism of a hypothetical reaction X2 + Y2 → 2 × Y is given below:
(b) X + Y2 → XY + Y (slow)
(c) X + Y → XY (fast)
The overall order of reaction is
(a) 2
(b) 0
(c) 1.5
(d) 1"
Answers
Explanation:
CHEMISTRY
Mechanism of a hypothetical reaction X
2
+Y
2
→2XY is given below:
(i) X
2
⇌X+X(fast)
(ii) X+Y
2
→XY+Y(slow)
(iii) X+Y→XY(fast)
The overall order of the reaction will be:
October 15, 2019avatar
Premlata Srinivas
SHARE
VIDEO EXPLANATION
ANSWER
Take reaction (i) and (iii) to be equilibrium reaction where value of k
f
>>>k
b
Therefore,
[X
2
]
[X]
2
=K
e
′
∴[X]=K
e
′
0.5
×[X
2
]
0.5
−(A)
Since reaction (ii) is the slowest step, so the rate of this reaction will be reaction rate for the main reaction.
∴r=K
e
[X][Y
2
] −(B)
Substituting equation (A) in equation (B)
We get r=K
e
×K
e
′
0.5
[X
2
]
0.5
[Y
2
]
Let K
e
×K
e
′
=K
∴r=K[X
2
]
0.5
[Y
2
]
Hence, order of reaction is 1+0.5=1.
v. please mark it brainliest