Advertisements
Advertisements
प्रश्न
Define order of reaction. How does order of a reaction differ from molecularity for a complex reaction?
Advertisements
उत्तर
Order of Reaction :
Rate = K[A]x [B]y
(x + y) = order of that chemical reaction.
The sum of powers of the concentration of the reactants in the rate law expression is called the order of that chemical reaction.
| Order of Reaction | Molecularity |
| Sum of power of the concentration of the reactants in the rate law expression | The number of reacting species (atoms, ions or molecules) taking part in an elementing reaction, which must colloide simultaneously in order to being about a chemical reaction. |
| Order is an experimental quantity It can be 0 or fraction. |
It cannot be zero or a non- integer |
| Order is applicable to elementary as well as complex reaction |
For complex reaction, molecularity has no meaning. |
APPEARS IN
संबंधित प्रश्न
A first order reaction has a rate constant 1.15 × 10−3 s−1. How long will 5 g of this reactant take to reduce to 3 g?
For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained.
| t (sec) | P(mm of Hg) |
| 0 | 35.0 |
| 360 | 54.0 |
| 720 | 63.0 |
Calculate the rate constant.
Show that the time required for 99.9% completion of a first-order reaction is three times the time required for 90% completion.
A first order reaction is 50% completed in 1.26 × 1014 s. How much time would it take for 100% completion?
In the presence of acid, the initial concentration of cane sugar was reduced from 0.2 M to 0.1 Min 5 hours and to 0.05 Min 10 hours. The reaction must be of?
Time required to decompose SO2Cl2 to half of its initial concentration is 60 minutes. If the de-composite is a first order reaction, calculated the rate constant of the reaction-
The decomposition of formic acid on gold surface follows first-order kinetics. If the rate constant at 300 K is 1.0 × 10−3 s−1 and the activation energy Ea = 11.488 kJ mol−1, the rate constant at 200 K is ______ × 10−5 s−1. (Round off to the Nearest Integer)
(Given R = 8.314 J mol−1 K−1)
For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for 50% completion is ______. (Integer answer)
How will you represent first order reactions graphically?
Slove: \[\ce{2NOBr -> 2NO_{2(g)} + Br_{2(g)}}\]
For the above reaction, the rate law is rate = k[NOBr]2. If the rate of reaction is 6.5 × 10−6 mol L−1 s−1 at 2 × 10−3 mol L−1 concentration of NOBr, calculate the rate constant k for the reaction.
