Abstract
Abstract The viscosity effect on the rate of reaction between marble and hydrochloric acid has been measured. The mechanism of the region of the first order reaction has been considered and the results show that the true chemical reaction on the marble surface and the diffusions of the reactant and reaction products concern in the same order in this reaction. The same conclusion is obtained from the experiments of changing the rotational velocity of the marble disk. The apparent heat of activation, which was calculated by Moelwyn-Hughes from the temperature coefficient of the rate, has been corrected by considering the viscosity effect.
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