CAIE IGCSE Chemistry 6.2.6 Rate Changes Using Collision Theory Questions

Use collision theory to explain how temperature, concentration, pressure and surface area change reaction rate and the proportion of successful collisions.

Exam points

explain temperature effects using kinetic energy, collision frequency and activation energy
link higher concentration or pressure to more particles per unit volume and more collisions
explain powdered solids using greater surface area and increased collision frequency
identify which conditions increase the proportion of successful collisions

[Maximum number: 1]

Which statements explain why increasing the temperature changes the rate of a chemical reaction?

1 It increases the activation energy.
2 It increases the frequency of collisions between the reacting particles.
3 It increases the kinetic energy of the reacting particles.
4 It increases the number of particles per unit volume.

1 and 2

1 and 4

2 and 3

3 and 4

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CAIE IGCSE Chemistry 6.2.6 Rate Changes Using Collision Theory Questions question 1