Question

Hannah added a silvery white metal to a beaker of cold water and noticed that

gas bubbles were given off and a different substance formed. When she
repeated the activity with hot water she noticed the gas bubbles were released
much more rapidly. Which statement best explains why the reaction occurred
faster in hot water?
A ) Hot water increases the collision rate of the molecules, causing the
reaction to occur faster.
B ) Hot water changes the concentration of the chemicals, causing the
reaction to occur faster.
C ) Hot water increases the surface area of the molecules, causing the reaction
to occur faster.
D ) Hot water changes the chemical composition of the water molecules,
causing the reaction to occur faster.

Answer 1

A. Hot water increases the collision rate of the molecules, causing the

reaction to occur faster.

Step-by-step explanation:

Hot water molecules move faster than cold water molecules.