Chemical Kinetics Part 1

A sample of milk splits after 60 min. at 300 K and after 40 min. at 400 K when the population of lactobacillus acidophilus in it doubles. The activation energy (in kJ/ mol) for this process is closest to___________
(Given, R=8.3Jmol−1K−1, ln‌

2

3

=0.4 , e−3=4.0 )