Exploring Kinetics and Catalysts in Biology

What is the study of the rate of chemical reactions called?

• Thermodynamics

• Kinetics

• Electrochemistry

• Stoichiometry

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Why is hydrogen considered a diatomic molecule?

• It forms ionic bonds

• It has two neutrons

• It bonds with itself in the gaseous state

• It has two protons

How many valence electrons does iodine have?

• 8

• 7

• 6

• 5

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What must happen for hydrogen and iodine molecules to form hydrogen iodide?

• They must be in a liquid state

• They must collide with enough energy and in the right orientation

• They must be in a solid state

• They must be heated to a very high temperature

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What is the high energy state during a chemical reaction called?

• Equilibrium state

• Activated complex

• Product state

• Reactant state

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What is the term for the minimum energy required to start a chemical reaction?

• Activation energy

• Thermal energy

• Potential energy

• Kinetic energy

What effect does a catalyst have on a chemical reaction?

• Decreases the product concentration

• Increases the reactant concentration

• Increases the activation energy

• Decreases the activation energy

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Which factor is most likely to increase the rate of a chemical reaction?

• Decreasing temperature

• Increasing temperature

• Decreasing concentration

• Decreasing surface area

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How does increasing the concentration of reactants affect the reaction rate?

• It stops the reaction

• It increases the reaction rate

• It has no effect on the reaction rate

• It decreases the reaction rate

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Why does increasing the surface area of reactants increase the reaction rate?

• It allows more reactant particles to collide

• It decreases the energy required

• It increases the temperature

• It changes the reactants into products

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