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Preferred Label : change ratio of a quantity;

IUPAC definition : A term which may be expressed infinitesimally at time t by a ratio of differentials dQ1(t)/dQ2(t) where the kind of quantities are the same but for different components in the same system. In practice, the ratio for a finite interval is: \[\frac{Δ Q_{1}(t_{1};\,t_{2})}{Δ Q_{2}(t_{1};t_{2})}\] Examples are: mass change ratio, dm1(t)/dm2(t); amount of substance change ratio, dn1(t)/dn2(t).;

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A term which may be expressed infinitesimally at time t by a ratio of differentials dQ1(t)/dQ2(t) where the kind of quantities are the same but for different components in the same system. In practice, the ratio for a finite interval is: \[\frac{Δ Q_{1}(t_{1};\,t_{2})}{Δ Q_{2}(t_{1};t_{2})}\] Examples are: mass change ratio, dm1(t)/dm2(t); amount of substance change ratio, dn1(t)/dn2(t).

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27/07/2025


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