Reaction Rate — Quiz Answers

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The production of water proceeds according equation. 2 cap h sub 2 g plus cap o sub 2 times g rightarrow 2 cap h sub 2 cap o g Which describes a way to speed up the collisions between hydrogen and oxygen molecules to produce more water?

A
Reduce the concentration of the reactants.
B
Maintain the same temperature of the reactants.
C
Place the reactants in a smaller container.
D
Use a less-intense source of heat on the reactants.
4

Which term refers to the speed at which reactants are converted into products?

A
reaction rate
B
spontaneous reaction
C
activation energy
D
meta stable state
5

A solid reactant is placed into a beaker of a warm water. The liquid vigorously bubbles as the solid dissolves into the solution. What will most likely happen if the temperature of the liquid is slightly reduced?

A
More bubbles will be produced because the solution is becoming more concentrated.
B
Fewer bubbles will be produced because of fewer collisions of reactant molecules.
C
The solid will get larger at a slower rate because precipitate is coming out of the solution.
D
The solid will get smaller at a faster rate because of more collisions of reactant molecules.
6

Which will cause an increase in the reaction rate between molecules?

A
Electrons do not have enough energy to leave the bonds.
B
Electrons in the bonds remain in a meta-stable state.
C
Molecules collide more frequently.
D
Molecules have strong internal bonding.
8

Which topic is commonly used to explain activation energy and how chemical reactions happen?

A
spontaneous reaction
B
collision theory
C
reaction rate
D
velocity distribution
9

Which applies to the collision theory?

A
Temperature increase causes kinetic energy of particles to decrease.
B
Particles need to collide in order to react.
C
Particles may obtain successful collisions in any molecular orientation.
D
Reactions do not have to begin with collision of molecules or particles.
10

An increase in temperature affects the reaction rate by

A
decreasing the energy that particles need to overcome the energy activation barrier.
B
increasing the number of molecules that have sufficient potential energy to react.
C
decreasing the velocities of particles that collide in the reaction.
D
increasing the number of molecules that have sufficient kinetic energy to react.

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