Factors that affecting reaction rate

Define Rate of reaction

• The change of the concentration of product only with time.

• The change of the concentration of product or reactant with time.

• The change of time for a reaction.

• The change of the concentration of product or reactant with pressure.

2 factors that affect reaction rate?

• Volume of Solution

• Size of container

• Temperature of the surroundings

• Present of catalyst

Figure shows which factor which affecting reaction rate?

• Concentration of reactant

• Temperature

• Pressure

• Volume of container

How temperature affecting rate of reaction?

• Provide alternative pathway with lower activation energy

• Increase the activation energy of reaction

• Decrease the numbers of colliding particles

• Increase the average kinetic energy of reactant

• Make sure reactants collide with correct orientation

This will____ and increase the reaction rate.

• Decrease the average kinetic energy of molecules.

• Increase numbers of colliding molecules per unit volume

• Lower the activation energy of reaction

• Increase the temperature of the container

The average kinetic energy of molecules is _____ to temperature

• directly proportional

• not proportional

• inversely proportional

A catalyst will ____ after a chemical reaction.

• change physically

• remain unchange

• change chemically

• dissappear

what represented by both curve?

• Different kinetic energies of molecules

• Difference in reaction rate

• Similarities of pressure in a reaction

• Lower temperature will increase reaction rate

The rate of a chemical reaction is NOT affected by which of the following:

• temperature
• concentration
• particle size (surface area)
• Maxwell constant

Which of the following will lower the rate

of reaction?

• adding a catalyst to the reaction

• decreasing the temperature from 40°C to

  10°C

• breaking a chunk of calcium up into

  smaller pieces

• increasing the amount of solute

  dissolved in a solution