The decomposition of ammonia is catalysed by tungsten metal.
2NH3 (g) N2 (g) + 3H2 (g)
This reaction has zero order kinetics.
rate = k
rate = k[NH3]
rate = k[NH3]2
rate = k[N2][H2]3
no units
s−1
mol dm−3 s−1
dm3 mol−1 s−1
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The decomposition of ammonia is catalysed by tungsten metal.
2NH3 (g) N2 (g) + 3H2 (g)
This reaction has zero order kinetics.
rate = k
rate = k[NH3]
rate = k[NH3]2
rate = k[N2][H2]3
no units
s−1
mol dm−3 s−1
dm3 mol−1 s−1
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The halogenoalkane 2-bromo-2-methylbutane was hydrolysed with sodium hydroxide solution, NaOH (aq).
Which suggestion about the mechanism of this reaction is correct?
Type of mechanism | Number of steps in mechanism | ||
□ | A | SN2 | one |
□ | B | SN2 | two |
□ | C | SN1 | one |
□ | D | SN1 | two |
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Nitrogen monoxide and hydrogen react together to form nitrogen and water.
2NO + 2H2 → N2 + 2H2O
The steps in the mechanism of the reaction are
Step 1 | 2NO ⇌ N2O2 | fast |
Step 2 | N2O2 + H2 → N2O + H2O | slow |
Step 3 | N2O + H2 → N2 + H2O | fast |
Which statement about the reaction is correct?
Step 3 is the rate determining step and the overall order is 2
Step 3 is the rate determining step and the overall order is 4
Step 2 is the rate determining step and the overall order is 2
Step 2 is the rate determining step and the overall order is 3
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The rate equation for a reaction is
rate = k [A]2 [B]0
The initial rate of reaction is 9.0 × 10−5 mol dm−3 s−1 when [A] = 0.30 mol dm−3 and [B] = 0.20 mol dm−3.
What is the value of the rate constant in dm3 mol−1 s−1?
8.1 × 10−6
3.0 × 10−4
1.0 × 10−3
5.0 × 10−3
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The Arrhenius equation can be shown as
In
A graph is plotted of ln k against 1/T for a reaction.
The activation energy, Ea , of this reaction equals
– gradient ÷ R
+ gradient ÷ R
– gradient × R
+ gradient × R
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Propanone reacts with iodine in the presence of a catalyst of dilute hydrochloric acid.
The reaction occurs in aqueous solution.
CH3COCH3 + I2 → CH3COCH2I + HI
The rate equation for this reaction is
rate = k[CH3COCH3][H+]
Which is a possible mechanism for the reaction?
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