Explain concentration, gas pressure and surface area using collisions.
| English | Chinese |
|---|---|
| collision | 碰撞 |
| concentration | 浓度 |
| surface area | 表面积 |
| successful collision | 有效碰撞 |
Try each question before opening its hint or answer. Use paper for calculations and diagrams.
Does crushing 2 g of marble create more particles in total? Explain the rate change.
Build the explanation from number per volume or exposed surface to collision frequency.
No. It exposes more surface particles, so successful collisions at the solid surface occur more frequently.
Explain why increasing acid concentration increases rate at the same temperature.
Consider the number of reacting particles per unit volume.
More reactant particles per unit volume cause more frequent successful collisions.
A gas mixture is compressed at constant temperature. Explain why it reacts faster.
At constant temperature, focus on collision frequency rather than energy.
Particles are closer together, so collisions and successful collisions occur more frequently.
Use Lesson 2 in your worksheet for written practice. Your teacher will discuss those answers in class.