Final answer:
No, not all time intervals provide equally reliable measurements of the reaction rate at 0.2 mm ONPG because it depends on the best time interval for the specific reaction. Accurate measurement might require capturing the instantaneous rate using the slope of a tangent on a concentration-time plot.
Step-by-step explanation:
The question is whether all time intervals provide equally reliable measurements of the reaction rate at 0.2 mm ONPG. The answer is c) No, it depends on the time interval. This is because the measurement of reaction rates often depends on the period over which the measurement is taken.
For example, if the reaction is very fast, measuring over a long time interval may not capture the initial rate accurately, as the reaction may have already proceeded to a point where the rate has changed. On the other hand, very short time intervals might suffer from experimental errors or may not be practical to measure. Thus, each reaction has an optimal time interval for measurement that provides the most accurate reflection of its rate, typically when the reaction is proceeding at a steady state.
In kinetics, obtaining the instantaneous rate is often more precise as it represents the change in concentration at a specific moment in time. To obtain an instantaneous rate, a graph of the concentration against time can be used, and the slope of the tangent at a specific time point can be calculated to give the instantaneous rate. This can involve complex calculations such as calculus.