Answer to Question #66952 in Physical Chemistry for murahi

Question

Question 18 : Rusting of iron Is an example of________ reaction
Fast
Slow
explosive
Moderate

Question 19 : Which of the following statements about the kinetics of the reaction
H
2
(
g
)
+
B
r
2
(
g
)
→
2
H
B
r
(
g
)
H2(g)+Br2(g)→2HBr(g)
is definitely true?
The presence of hydrogen bromide, HBr, inhibits the rate of the reaction
The reaction is first order with respect to bromine, Br2.
It is not possible to determine anything about the kinetics of the reaction from the stoichiometry.
The reaction is second order overall.

Question 20 : Rate of reaction is defined as the
None of the above
Rate of change of conc. of product only
Rate of change of conc. of reactant only
Rate of change of concentration Of either reactant or product per unit time

Answer 1

Question 18: The limiting stage is the slowest stage of the chemical reaction. So the correct answer: Slow.

Question 19: n =2. So the correct answer: The reaction is second order overall.

Question 20: The speed of a chemical reaction is the amount of a substance entering into a reaction or formed during a reaction per unit time in a unit volume of the system. So the correct answer: Rate of change of concentration Of either reactant or product per unit time.


Question 18: Slow;
Question 19: The reaction is second order overall;
Question 20: Rate of change of concentration Of either reactant or product per unit time.