4. The swelling of cellulose in water decreases with increasing temperature, and that of gelatin increases, because:
a) the rate of swelling of cellulose decreases, while that of gelatin increases.
b) the swelling rate constant of cellulose decreases, the swelling rate constant of gelatin increases,
c) ΔHsolv.cell < 0, ΔHsolv.gel > 0.

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