11) Enzymes - Activation Energy

Question 1

In a liquid, molecules are always m_________ and c_________ with each other.

Answer 1

moving

colliding

Question 2

Every molecule has different amounts of k___________ energy.

Answer 2

kinetic

Question 3

If the right m_________ collide with s_________ energy, then a c________ r________ will occur.

Answer 3

molecules
sufficient
chemical reaction

Question 4

All reactions require a certain amount of k_________ e__________ to start.
This is called the a__________ e__________.

Answer 4

kinetic energy

activation energy

Question 5

Definition
Activation energy is the e_________ required to s__________
a r____________.

Answer 5

energy
start
reaction

Question 6

If more molecules in a given container have enough kinetic energy to react, then there will be more s__________ c__________ e__________ s___________.

Answer 6

successful collisions every second

Question 7

A reaction with a l_________ activation energy will occur faster.
This is because at the start, there will be more molecules that have enough energy to react.

Answer 7

lower

Some reactions are very spontaneous and require less energy to start

Question 8

Lowering the a_______ e________ has the same kind of effect as i________
the t__________.

Answer 8

activation energy

increasing temperature

Question 9

How is the activation energy, required for a reaction, lowered?

Answer 9

By enzymes.

Question 10

Enzymes c__________ reactions by l_________ the a_______ e__________
required for a reaction to occur.

Answer 10

catalyse

lowering activation energy

Question 11

This form of catalysis (enzymes) allows reactions to occur at l_________ t_________.

Answer 11

lower temperatures