Year 13 Rates Part 1

increasing .................... provides more particles per unit volume.

• Temperature

• Concentration

• Surface area

• Rate

Increasing ..................... give particles more energy.

• Temperature

• Concentration

• Surface Area

• Rate

Increasing surface area is done by:

• Adding more chemical

• Chopping up into smaller chunks

• Reducing the quantity of chemical

• Using larger lumps

The rate of reaction is fastest:

• At the end of the reaction.

• In the middle of the reaction.

• At the start of a reaction.

• It is continuously fast.

The feature of a graph which shows the rate is the:

• Line shape

• Gradient

• Origin

• Y axis

The activation energy is:

• The kinetic energy of particles

• The heat energy of the reaction

• The minimum energy for a reaction

• The energy supplied when heated

2 variables which increase the rate are:

• Higher temp. and lower concentration

• Higher concentration and powdered reactant

• Adding a catalyst and reducing pressure

• Higher temp. and lumps of reactant

The best definition of rate is:

• Speed of a reaction

• Speed at which reactants are used up

• Change in concentration of reactant/product per unit time

• Speed of product production