3b)iii) - Kinetic Energy Dustribution

Question 1

What is temperature

Answer 1

Temperature is a measure of the average kinetic energy of the particles in a substance

Question 2

What is the activation energy

Answer 2

The activation energy the minimum kinetic energy required by colliding particles before a reaction may occur

Question 3

What is the effect of increasing temperature on the graph

Answer 3

Second curve lower than the first but more stretched out

Question 4

What is the effect of decreasing temperature on the graph

Answer 4

Shifts graph to the left top of the curve much higher than original

Question 5

What is the effect of catalyst on the graph

Answer 5

Shift activation energy line to the left

Question 6

Explanation of increasing temperature

Answer 6

Reaction rate is faster because there is a larger number of particles with the minimum kinetic energy required to react

Question 7

Explanation of decreasing temperature

Answer 7

Smaller number of particles with the minimum kinetic energy to be able to react so slows down reaction rate

Question 8

Explanation of the use of catalyst

Answer 8

More molecules have the minimum kinetic energy required to react