12. Solving a chemistry problem

5. Determine the order and rate constant of the reaction proceeding at a given temperature T, K, using data on the course of the process in time t (from the beginning of the reaction).
variant reaction t, min a T,K
5 2C2H5OH 2Br2 → CH3COOC2H5 4Br
Alcohol in excess
a- concentration of bromine * 103, mol / l 0 4.24 298.2
4 3.14
6 2.49
10 2.24
15 1.78
0 8.14
4 6.10
10 4.45
15 3.73