Which one of the following given graphs represents the variation of rate constant (k) with temperature (T) for an…
Chemical Kinetics · Class 12 · JEE Main Previous Year Question
Which one of the following given graphs represents the variation of rate constant (k) with temperature (T) for an endothermic reaction?
- a
Option 1
- b
Option 2
- c
Option 3
- d✓
Option 4
Option 4
For any reaction (endothermic or exothermic), the rate constant increases with temperature according to the Arrhenius equation:
As increases, increases exponentially. The graph of vs is an exponential curve that starts near zero at low temperatures and rises steeply.
For an endothermic reaction, , but the shape of vs is still an exponential increase.
Answer: Option (4) — exponential increase of k with T
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