Question

Which of the following increases the rate that a reaction occurs?


a) Keeping the size of the substance the same

b) Cutting a substance into smaller pieces

c) Using a larger piece of substance

Answer 1

cutting the substance in smaller pieces.

Answer 2

^ because increased surface area allows for more molecules on the surface to be exposed/available for reaction.

Cutting something into smaller pieces increases surface area.

Answer 3

rate of reaction is directly propositional to rate of adsorption and it is directly propositional to surface area.
so greater the surface area greater is the rate

Answer 4

Surface area is the key. Both using a larger piece and cutting the same piece into smaller parts will increase surface area, increasing rate of reaction.

Answer 5

^good point, a larger piece has greater surface area as well.