Energy

Question 1

What does a high % yield show?

Answer 1

It shows that a high % of the reactants are converted to products.

Question 2

What does a low atom economy show?

Answer 2

It shows that there is a lot of waste products being produced.

Question 3

What effect does temperature have on the rate of reaction?

Answer 3

The rate increase because the molecules have more kinetic energy, therefore more collisions take place per second. Also a higher proportion of molecules have an energy greater than the activation energy, therefore there will be more successful collisions. This can be shown on a Boltzmann distribution graph. The line shifts to the right and is lower than the original cooler temperature.

Question 4

What effect does a catalyst have on the rate of reaction?

Answer 4

A catalyst lowers the activation energy required. Therefore on a Boltzmann distribution graph there is a greater proportion of molecules exceeds the activation energy, so there will be more successful collisions in the same amount of time.