The rate constant of a first order reaction is doubled when
the temperature is increased from 20°C to 25°C. How many
times the rate constant will increase if the temperature is
raised from 20°C to 40°C ?
(a) 4 (b) 8 (c) 16 (d) 32
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Explanation:
For every { 5 }^{ o }5
o
rise in temperature, the rate constant becomes double.
\therefore∴ For { 20 }^{ o }C20
o
C (5\times 45×4 times) rise in temperature, the rate constant, k={ 2 }^{ 4 }=16k=2
4
=16.
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