C8-Reaction Kinetics

Question 1

Based on collision theory, what conditions must particles fulfil for a reaction to occur?

Answer 1

• Particles collide with each other
• Collisions in correct orientation
• Collisions achieve activation energy

Question 2

Rate of reaction

Answer 2

Change in quantity of reactants or products per unit time.

Question 3

Activation energy

Answer 3

Minimum amount of energy that reacting particles must achieve to overcome it for a chemical reaction to occur.

Question 4

Where’s Ea on energy profile diagram?

Answer 4

From reactants to peak

Question 5

What’s Ea usually for?

Answer 5

• Break bonds in reacting particles.

- Overcome repulsive forces when reacting particles close to each other (so that they can collide)

Question 6

Why are transition metals good catalyst?

Answer 6

• Have partially filled d electron orbitals.
• Enable transition metal to form temporary bonds with reacting particles.
• Weak adsorption of transition metal enable it to remain chemically unchanged at the end of reaction.

Question 7

Autocatalysis

Answer 7

A condition when a product of a chemical reaction acts as a catalyst.

Question 8

Homogenous catalyst

Answer 8

Catalyst and reactants have same physical state

Question 9

Heterogenous catalyst

Answer 9

Catalyst and reactants have different physical states

Question 10

When will a system achieve kinetic stability?

Answer 10

When the reaction has high activation energy that no reacting particles and no collision achieve enough energy to react.