Question

Which law states that the energy required for size reduction is proportional to the change in surface area?

• A. Rittinger's Law
• B. Kick's Law
• C. Bond's Law
• D. Newton's Law

Hint:

Rittinger's Law → Energy ∝ Increase in surface area → Fine grinding.

Answer 1

The Correct Option is A

Concept: In size reduction (comminution) processes used in food engineering and chemical engineering, different laws describe the relationship between energy input and particle size reduction.
Step 1: Understanding Rittinger's Law.
Rittinger's Law states that the energy required for size reduction is directly proportional to the new surface area generated.
Step 2: Mathematical interpretation.
It assumes that energy is used primarily to create new surfaces; hence, finer particles require more energy.
Step 3: Comparison with other laws.

• Kick's Law: Energy depends on size reduction ratio
• Bond's Law: Intermediate theory between Kick and Rittinger
• Newton's Law: Not related to size reduction

Step 4: Conclusion.
Thus, Rittinger's Law correctly describes energy proportional to change in surface area.