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At which point is the rate of reaction greatest on a gas-volume graph?
At the final point where volume is highest
At the steepest part of the curve
Remember: rate = gradient, not total gas volume. The steeper the curve, the faster the reaction.
How does a catalyst speed up a reaction?
It gives particles more energy
It provides an alternative pathway with lower activation energy
Catalysts do not increase particle energy. They lower the activation energy so more collisions are successful.
Why does increasing concentration speed up a reaction?
Particles have more energy when collided
More particles per volume → more frequent collisions
Concentration increases collision frequency, not collision energy. Only temperature changes energy.