Chemistry: Final Exam Review
Questions & Answers (Grade A+)
How many valence electrons are in an atom of chlorine? -
correct answer ✅7
How many valence electrons does aluminum have? -
correct answer ✅3
Define Reaction Rate -
correct answer ✅The decrease in concentration of reactants or the
increase in concentration of products with time.
How does increasing temperature affect the rate of reaction? -
correct answer ✅Increasing temperature causes the kinetic energy
to increase. Thus, molecules are moving faster and colliding more
frequently. This causes the rate of reaction to incrase.
If I decrease the concentration of reactant, what happens to the
rate of reaction? -
correct answer ✅Decreasing concentration leads to less reactants
available for collision. Therefore, reaction rate decreases.
How does surface area influence reaction rate? -
correct answer ✅By increasing the surface area of reactant
, Chemistry: Final Exam Review
Questions & Answers (Grade A+)
molecules, we are increasing the space or point of contact that
these molecules have available to interact. This causes an increase
in the rate of reaction.
How does a catalyst speed up a chemical reaction? -
correct answer ✅A catalyst speeds up a chemical reaction by
finding an alternate pathway with a lower activation energy.
Define activation energy. -
correct answer ✅The energy required to start a chemical reaction.
Define equilibrium. -
correct answer ✅Equilibrium is established when the rate of the
forward reaction is equal to the rate of the reverse reaction.
Is energy absorbed or released in an endothermic reaction? -
correct answer ✅Absorbed.
What is the sign of delta H for an exothermic reaction? -
correct answer ✅Exothermic reactions release energy. The sign of
delta H is negative.
Questions & Answers (Grade A+)
How many valence electrons are in an atom of chlorine? -
correct answer ✅7
How many valence electrons does aluminum have? -
correct answer ✅3
Define Reaction Rate -
correct answer ✅The decrease in concentration of reactants or the
increase in concentration of products with time.
How does increasing temperature affect the rate of reaction? -
correct answer ✅Increasing temperature causes the kinetic energy
to increase. Thus, molecules are moving faster and colliding more
frequently. This causes the rate of reaction to incrase.
If I decrease the concentration of reactant, what happens to the
rate of reaction? -
correct answer ✅Decreasing concentration leads to less reactants
available for collision. Therefore, reaction rate decreases.
How does surface area influence reaction rate? -
correct answer ✅By increasing the surface area of reactant
, Chemistry: Final Exam Review
Questions & Answers (Grade A+)
molecules, we are increasing the space or point of contact that
these molecules have available to interact. This causes an increase
in the rate of reaction.
How does a catalyst speed up a chemical reaction? -
correct answer ✅A catalyst speeds up a chemical reaction by
finding an alternate pathway with a lower activation energy.
Define activation energy. -
correct answer ✅The energy required to start a chemical reaction.
Define equilibrium. -
correct answer ✅Equilibrium is established when the rate of the
forward reaction is equal to the rate of the reverse reaction.
Is energy absorbed or released in an endothermic reaction? -
correct answer ✅Absorbed.
What is the sign of delta H for an exothermic reaction? -
correct answer ✅Exothermic reactions release energy. The sign of
delta H is negative.
