U4 Reaction rate

Reaction Rate is _______

An increase of temperature would:

• Slow reaction rate

• Speed up reaction rate

• Wouldn't change the reaction rate

• Would Stop the Reaction from occuring

Increasing Pressure causes the reacting particles

• to bond together

• gain more kinetic energy

• to move closer together

• to repel from each other

What is Activation Energy

• The speed at which a molecule or atom vibrates per second

• The maximum amount of energy that is required to activate molecules to undergo chemical thransformation or physical transport

• The minimum amount of energy that is required to activate moliclues to undergo chemical transformation or physical transport

• The energy that makes the Atom

Products will form faster if____________

• the particle size of the reactants are larger.
• temperature is decreased.
• concentration of the reactants are increased.
• the reaction is not stirred.

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst
• product
• reactant
• solute

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

• larger

• smaller

• rectangular

• spherical

Increasing the ____ causes the particles (atoms

or molecules) of the reactants to move more quickly so that

they collide with each other more frequently and with more

energy.

• Catalyst

• Surface Area

• Temperature

• Concentration

Grains of sugar have a greater _______ than a solid cube of

sugar of the same mass, and therefore will dissolve quicker in water.

• Surface Area

• Catalyst

• Temperature

• Concentratrion

Which of the following will lower the rate

of reaction?

• adding an enzyme to the reaction

• decreasing the temperature from 40°C to

  10°C

• breaking a chunk of calcium up into

  smaller pieces

• increasing the amount of solute

  dissolved in a solution