Chemistry

Chemistry

Problem

A chemist runs four trials of the reaction C→productsC \to \text{products} and records the following initial conditions and rates: • Trial 1: [C]0=0.20 M[C]_0 = 0.20\,\text{M}, T=298 KT = 298\,\text{K}, stirring on, rate = 0.015 M s−10.015\,\text{M}\,\text{s}^{-1} • Trial 2: [C]0=0.20 M[C]_0 = 0.20\,\text{M}, T=308 KT = 308\,\text{K}, stirring on, rate = 0.031 M s−10.031\,\text{M}\,\text{s}^{-1} • Trial 3: [C]0=0.10 M[C]_0 = 0.10\,\text{M}, T=308 KT = 308\,\text{K}, stirring on, rate = 0.015 M s−10.015\,\text{M}\,\text{s}^{-1} • Trial 4: [C]0=0.20 M[C]_0 = 0.20\,\text{M}, T=298 KT = 298\,\text{K}, stirring off, rate = 0.010 M s−10.010\,\text{M}\,\text{s}^{-1} To evaluate the hypothesis that raising temperature doubles the rate by increasing the fraction of effective collisions, which pair of trials should the chemist compare to minimize confounding variables? a) Trials 1 and 3 b) Trials 1 and 4 c) Trials 1 and 2 d) Trials 2 and 3

Browse the problem library