Chemistry (OER)
19th Edition
ISBN: 9781947172623
Author: OpenStax
Publisher: OpenStax College
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Chapter 12, Problem 1E
What is the difference between average rate, initial rate, and instantaneous rate?
Expert Solution & Answer
Interpretation Introduction
Interpretation: The difference between average rate, initial rate, and instantaneous rate is to be determined.
Concept Introduction: The average rate is the rate of reaction over a longer period of time as compared to the instantaneous rate which is the rate at a particular instant. The initial rate is the instantaneous rate of reaction when a reaction commences.
Explanation of Solution
Average rate over a specific time period is defined as the change in a concentration over that period divided by the time interval. The initial rate is the instantaneous rate of reaction when a reaction commences, just as the new product begins to get formed. The instantaneous rate is the rate of a reaction at any specific point in time, expressed as the differential of concentration with respect to time. Thus, the average rate is the rate of reaction over a longer period of time as compared to the instantaneous rate which is the rate at a particular instant.
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