Discussion
Rittinger's law states that the energy required for size reduction is proportional to
Answer: A
Correct answer: The new surface area created
Rittinger's law holds that the energy required for size reduction is proportional to the new surface area created:
\[ E = K_R \left( \frac{1}{x_2} - \frac{1}{x_1} \right) \]
Since surface area per unit mass varies inversely with particle size, the energy rises steeply as the product gets finer - which is why fine grinding is disproportionately expensive. The law fits fine grinding best; Kick's law, based on the logarithm of the size ratio, fits coarse crushing, and Bond's law the intermediate range.
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