please tell me The Law of Van't Hoff

please tell me The Law of Van't Hoff

  1. The dependence of the rate of chemical reaction on temperature describes the empirical rule of Van't Hoff.

    The law of the VANT-GOFFA describes the dependence of the OSMOTIC PRESSURE of dilute solutions on the temperature and molar concentration of the solution:
    Van't Hoff came to the conclusion that Avogadro's law is also valid for dilute solutions. He experimentally established that the osmotic pressure, which is a measure of the tendency of two different solutions on both sides of the membrane to equalize the concentration, in weak solutions depends not only on concentration but also on temperature and, consequently, obeys the laws of gas thermodynamics. Vant-Goff expressed the osmotic pressure by the formula PV = iRT, where P is the osmotic pressure of the substance dissolved in the liquid; V volume; R is the gas constant; T temperature and i coefficient, which for gases is often equal to 1, and for solutions containing salts, more than one. Van't Hoff was able to explain why the value of i varies, relating this coefficient to the number of ions in solution. The studies of dilute solutions carried out by Vant-Hoff served as a basis for the theory of electrolytic dissociation of S. Arrhenius. Subsequently, Arrhenius came to Amsterdam and worked with Vant-Hoff.

  2. With increasing temperature for every 10 degrees, the rate of chemical reaction increases in 2-4 times.

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