17.1 - 17.5 Chemical Equilibrium

The study of reaction rate is called _______________.

The collision model of reactions states that reactions must occur with enough _________ to break bonds and form bonds.

According to the collision model, having a higher ___________ increases reaction rate because there are more particles in a given space to collide with each other.

• concentration

• temperature

• surface area

• none of the above

According to the collision theory, which of the following would rust the fastest?

• finely ground iron filings

• small chunks of iron

• an iron nail

According to the collision theory, increasing the ________________ will increase reaction rate because it increases the kinetic energy in the particles.

• concentration

• temperature

• surface area

• none of the above

A substance that speeds up a reaction without being consumed is called a _________________.

The amount of energy needed for a reaction to take place is called the __________________ energy.

The diagram shown is an example of a(an) ___________ reaction because the energy in the products is __________.

• exothermic, higher

• endothermic, higher

• exothermic, lower

• endothermic, lower

The activation energy in the above diagram is ___________ kJ.

• -80 kJ

• 160 kJ

• 80 kJ

• -160 kJ

The reactants in the above reaction are at 56 kJ, the top of the curve is at 78 kJ, and the products are at 16 kJ. The activation energy is _____ kJ.