A chemist investigates the reaction of a mixture of gases. The temperature and composition of the mixture are kept the same. The mixture is compressed to different initial pressures.
The initial rate of the reaction is directly proportional to the initial pressure.
| Initial pressure (kPa) | Initial rate (mol/s) |
|---|---|
| 120 | 0.30 |
| 240 | not yet known |
Calculate how many times greater the initial pressure is at 240 kPa than at 120 kPa.
Calculate the initial rate of the reaction at an initial pressure of 240 kPa.
Explain why compressing the gas mixture increases its initial rate of reaction. Refer to particles in your answer.
127 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1a Calculating rates of reactions, 6.1.1b Gradient of a tangent as rate, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.