Chemistry Coursework - “the Dissappearing Cross”

CHEMISTRY COURSEWORK- “THE DISSAPPEARING CROSS”

PLANNING

Background Information:

During a chemical reaction the reacting particles must collide with each other, however, collision alone does not guarantee that the reaction will start. Reaction will only occur if the colliding particles have sufficient combined energy to get over the energy barrier between reactants and products. This minimum amount of energy that is required is called the activation energy.

• Changing the Temperature: As we increase the temperature in the reaction the particles will move more quickly and will collide more often with greater kinetic energy and more collisions will be successful. In general, an increase of 10 Kelvin causes the rate of reaction to double.

• Changing the Concentration: As the concentration of the particles increase they are more likely to collide giving more frequent collisions. The rate of reaction will increase.

• Changing the Surface Area: This can only take place in solids. Large particles have small surface area. Fewer particles