For the gas phase isomerization of cyclobutene, (CH2)2(CH)2CH2=CHCH=CH2 the rate constant has been determined at several temperatures. When ln k in s-1 is plotted against the reciprocal of the Kelvin temperature, the resulting linear plot has a slope of -1.64×104 K and a y-intercept of 30.1. The activation energy for the gas phase isomerization of cyclobutene is __________kJ/mol.

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