The reaction L - M is started with 10g of L. After 30 and 90 minutes, 5g and 1.25g of L are left respectively. The order of reaction is

Question

The reaction L -> M is started with 10g of L. After 30 and 90 minutes, 5g and 1.25g of L are left respectively. The order of reaction is

anonymous · Answer

This is a unimolecular reaction so our rate is $$r = k[L]^x$$ And what we really want is x, which is the order of reaction. Also, it appears that ever 30 minutes the concentration halves, so our reaction half-life looks like 30 minutes. Take a look at the second to last row here: https://en.wikipedia.org/wiki/Rate_equation#Summary_for_reaction_orders_0.2C_1.2C_2.2C_and_n Because it seems fairly clear that we will have a linear plot by putting t on the x-axis and ln[L] on the y-axis to determine k. |dw:1441186633635:dw| You can see the distance between the points on the y-axis is $\ln 2$, which is just a linear, constant value you add to each point to get up to the next point, so they're evenly spaced.