7. Calculate the degree of swelling of gelatin in water and the average value of the rate constant of this process (gelatin sample m=1.09*10-3 kg), according to the experimental data below:
Swelling time t, min 150 200 250
Volume of absorbed water Vж*10-7, m3 1357 1626 1807
Temperature 18 C maximum amount of absorbed water v=2112*10-7 m3, p=1000

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