80. When studying the dependence of the solubility of nickel dimethylglyoxime in water on temperature, the following results were obtained:
T,K 298 303 308 313 318
Solubility*103, mol/l 0.105 0.139 0.184 0.240 0.307
Calculate graphically the enthalpy of dissolution of nickel dimethylglyoxime in water.

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