QuestionJuly 28, 2025

Which statements are true regarding reaction rates'[Select all that apply.] Larger activation energies are associated with faster reaction rates. Higher reactant concentrations are associated with faster reaction rates. Reducing the activation energy for a reaction increases its reaction rate. Reaction rates depend on how likely molecules are to collide in the correct orientation to react. Reactions that give off heat occur rapidly. Reactions that absorb heat occur rapidly. Large changes in enthalpy are associated with fast reaction rates. At high temperatures molecules are more likely to collide with enough energy to initiate a reaction. Two molecules must collide with one another to react.

Which statements are true regarding reaction rates'[Select all that apply.] Larger activation energies are associated with faster reaction rates. Higher reactant concentrations are associated with faster reaction rates. Reducing the activation energy for a reaction increases its reaction rate. Reaction rates depend on how likely molecules are to collide in the correct orientation to react. Reactions that give off heat occur rapidly. Reactions that absorb heat occur rapidly. Large changes in enthalpy are associated with fast reaction rates. At high temperatures molecules are more likely to collide with enough energy to initiate a reaction. Two molecules must collide with one another to react.
Which statements are true regarding reaction rates'[Select all that apply.] Larger activation energies are associated with faster reaction rates. Higher reactant concentrations are associated with faster reaction rates. Reducing the activation energy for a reaction increases its reaction rate. Reaction rates depend on how likely molecules are to collide in the correct orientation to react. Reactions that give off heat occur rapidly. Reactions that absorb heat occur rapidly. Large changes in enthalpy are associated with fast reaction rates. At high temperatures molecules are more likely to collide with enough energy to initiate a reaction. Two molecules must collide with one another to react.

Solution
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Answer

Higher reactant concentrations are associated with faster reaction rates. ### Reducing the activation energy for a reaction increases its reaction rate. ### Reaction rates depend on how likely molecules are to collide in the correct orientation to react. ### At high temperatures molecules are more likely to collide with enough energy to initiate a reaction. ### Two molecules must collide with one another to react. Explanation 1. Evaluate Activation Energy and Reaction Rate Larger activation energies are associated with slower reaction rates, not faster. 2. Assess Reactant Concentration Impact Higher reactant concentrations generally increase reaction rates due to more frequent collisions. 3. Consider Effect of Reducing Activation Energy Reducing the activation energy increases the reaction rate by making it easier for molecules to overcome the energy barrier. 4. Analyze Collision Theory Reaction rates depend on the likelihood of molecules colliding in the correct orientation and with sufficient energy. 5. Examine Heat Release and Absorption Reactions that give off heat (exothermic) do not necessarily occur rapidly; same applies to endothermic reactions. 6. Relate Enthalpy Changes to Reaction Rates Large changes in enthalpy are not directly associated with fast reaction rates. 7. Temperature Influence on Molecular Collisions At high temperatures, molecules have more kinetic energy, increasing the likelihood of successful collisions. 8. Necessity of Molecular Collisions Two molecules must collide to react, aligning with collision theory.

Explanation

1. Evaluate Activation Energy and Reaction Rate<br /> Larger activation energies are associated with slower reaction rates, not faster.<br /><br />2. Assess Reactant Concentration Impact<br /> Higher reactant concentrations generally increase reaction rates due to more frequent collisions.<br /><br />3. Consider Effect of Reducing Activation Energy<br /> Reducing the activation energy increases the reaction rate by making it easier for molecules to overcome the energy barrier.<br /><br />4. Analyze Collision Theory<br /> Reaction rates depend on the likelihood of molecules colliding in the correct orientation and with sufficient energy.<br /><br />5. Examine Heat Release and Absorption<br /> Reactions that give off heat (exothermic) do not necessarily occur rapidly; same applies to endothermic reactions.<br /><br />6. Relate Enthalpy Changes to Reaction Rates<br /> Large changes in enthalpy are not directly associated with fast reaction rates.<br /><br />7. Temperature Influence on Molecular Collisions<br /> At high temperatures, molecules have more kinetic energy, increasing the likelihood of successful collisions.<br /><br />8. Necessity of Molecular Collisions<br /> Two molecules must collide to react, aligning with collision theory.
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