A student observes the dimerization [dye-mur-ih-ZAY-shun] of a solution of cyclopentadiene [sigh-kloh-penta-DYE-een]. Assuming the reaction is second-order in cyclopentadiene, which of the following will she observe as she continues to monitor the reaction?

W) The rate increases

X) The rate remains constant

Y) The half-life increases

Z) The half-life remains constant
Y) THE HALF-LIFE INCREASES