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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

What happens to most probable kinetic energy and the energy of activation with increase in temperature?

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प्रश्न

What happens to most probable kinetic energy and the energy of activation with increase in temperature?

दीर्घउत्तर
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उत्तर

When the temperature is raised’ the maxima of the curve moves to the higher energy value and the curve broadens out so that there is a greater proportion of the molecules with much higher energies. Most probable kinetic energy increases with increase in temperature. As the temperature increases, activation energy decreases which will result in the increase in the rate of reaction.

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पाठ 4: Chemical Kinetics - Exercises [पृष्ठ ५९]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 4 Chemical Kinetics
Exercises | Q VI. 63. | पृष्ठ ५९

संबंधित प्रश्‍न

(b) Rate constant ‘k’ of a reaction varies with temperature ‘T’ according to the equation:

`logk=logA-E_a/2.303R(1/T)`

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The rate constant of a first order reaction increases from 4 × 10−2 to 8 × 10−2 when the temperature changes from 27°C to 37°C. Calculate the energy of activation (Ea). (log 2 = 0.301, log 3 = 0.4771, log 4 = 0.6021)


What will be the effect of temperature on rate constant?


Define activation energy.


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 Write a condition under which a bimolecular reaction is kinetically first order. Give an example of  such a reaction. (Given : log2 = 0.3010,log 3 = 0.4771, log5 = 0.6990).


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(ii) energy is always absorbed

(iii) energy does not change

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  Column I Column I
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(ii) Molecularity (b) proper orientation is not there always
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(iv) `e^((-E_a)/(RT)` (d) is same as the first
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