$25\,\text{cm}^3$ of $1.0\,\text{mol dm}^{-3}$ hydrochloric acid reacts with $10\,\text{g}$ of a solid to form a gas. The solid is in excess. The graph labelled first experiment shows how the volume of gas changes with time. Graphs P and Q show the volume of gas produced when the conditions are different. Which changes in conditions produce graphs P and Q, assuming that every other condition stays the same?
- AP uses a catalyst and Q has a lower temperature.
- BP uses $25\,\text{cm}^3$ of more concentrated acid and Q uses smaller pieces of solid.
- CP uses a higher temperature and Q uses $25\,\text{cm}^3$ of more dilute acid.
- DP uses smaller pieces of solid and Q uses larger pieces of solid.