Assessment: Chemical Kinetics: Rates of Reaction
Answer every question, then submit to see your score and which topics to review.
Part A — Concept Questions
Why do most collisions between reactant particles NOT result in a reaction?
EasyIs activation energy ever negative for a reaction?
MediumPart B — Formula & Application
A reactant's concentration drops from 1.20 mol/L to 0.90 mol/L over 25 seconds. Find the average rate (mol/(L·s)).
MediumA reaction has a rate of 0.008 mol/(L·s) at 15°C. Using the "rate doubles every 10°C" rule, estimate the rate (mol/(L·s)) at 35°C.
MediumPart C — Problem Solving
A catalyst lowers a reaction's activation energy. On a Maxwell–Boltzmann distribution graph (at the same temperature), what changes?
HardTwo identical masses of calcium carbonate react with excess acid — one as a single large lump, one crushed into a fine powder. Which statement is correct?
HardPart D — Real-Life Application
Why does food stored in a refrigerator stay fresh much longer than food left at room temperature?
MediumPart E — Challenge
A catalyst is added to a reaction. Which of the following does the catalyst change?
Hard0/8 answered