[annoying]

I need help for this kinetics question:

Chlorination of butene at 0 degrees c, liquid phase, dichloromethane as solvent.
initial concentration of butene is 0.1M
conversion of 47.71% achieved after 3.1 hours.
an additional 0.5M of hot butene was added at this point, which increased the temperature of the mixture to 10 degrees c
after another 20mins the concentration of the alkene in the mixture is 0.52M.

determine the value of the rate constant at 0 degrees C and its temperature dependence.

I have some answers but am very unsure about them. Grateful if someone can help.

[Dan]

an additional 0.5M of hot butene was added at this point

You need to know how much, M is a unit of concentration. Things don't add up here though. You start with 0.1 M butene, wait 3.1 h and then add an unspecified amount of 0.5 M butene. The final concentration of butene must be <0.5 M, yet you sat it it 0.52 M after a further 20 mins.

Do you mean 0.5 M, 0.5 mol or something else?

I have some answers but am very unsure about them.

Nevertheless, the Forum Rules state you must show what you have done before we will help you.