chapter 5- kinetics

Question 1

what is activation energy

Answer 1

the minimum energy required for a reaction to occur

Question 2

what type of reaction is a positive energy change

Answer 2

endothermic

Question 3

what type of reaction is a negative energy change

Answer 3

exothermic

Question 4

what factors affect the rates of a reaction

Answer 4

• temperature
• pressure (gas)
• concentration of solution (liquids)
• surface area (solids)
• adding a catalyst

Question 5

what does the Maxwell-Boltzmann distribution show

Answer 5

it shows the distribution of the energy amongst the particles in any gas or liquid

Question 6

what happens to the Maxwell-Boltzmann graph when temperature is increased

Answer 6

• the peak of the curve is lowered and moves slightly to the right
• the number of particles with very high energy increases
• the total area under the curve is the same for all temperatures

Question 7

why is the total area under the curve the same for each temperature in a Maxwell-Boltzmann distribution graph

Answer 7

because it represents the total number of particles