In a zero-order reaction, the concentration of the product increases in proportion to the _____________________?
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Answer: A. Increase of reaction time
Explanation
Zero-order reaction rates are completely independent of reactant concentrations in the system. The rate of product formation remains constant throughout the course of the reaction. Integrating a constant rate equation shows product concentration increases linearly with time. Reaction order defines the mathematical power dependence of the rate on species concentrations. Zero-order kinetics often occur during catalytic surface-saturation or photochemical reaction processes. Product concentration accumulates directly in proportion to elapsed reaction time intervals.
Surface-catalyzed reactions often exhibit zero-order behavior when active sites are fully saturated. Zero-order kinetics simplify reactor design calculations because reaction rates remain entirely constant. Understanding reaction orders helps engineers predict concentration profiles in industrial reactors. Initial concentration changes do not alter zero-order reaction rates or product formation. Total pressure affects gas phase reactions but does not dictate zero-order kinetics directly. Decreasing total pressure has no direct linear proportionality with zero-order product accumulation.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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