Chem 2 Ch 17/18

Energy change for reaction is the difference between

• products and activated complex

• reactants and activated complex

• products and reactants

• reactants and intermediates

The study of factors that affect reaction rates is called

• thermochemistry

• chemical kinetics

• electrochemistry

• stoichiometry

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The activated complex is

• an unstable arrangement of colliding particles

• a high energy molecule with a stable structure

• a low energy molecule of with a stable structure

• the same as an intermediate

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Catalysts affect reaction rates by

• increasing the activation energy

• raising the value of K

• forming an activated complex with a lower energy

• changing the energy between the reactants and products

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A reaction mechanism shows

• the entire stepwise set of chemical reactions, including intermediates

• only the final balanced equation for a reaction

• only one step in a chemical reaction

• only the rate determining step

If concentration of reactants is increased

• the reaction rate increases

• the reaction rate decreases

• the rate determining step is eliminated

• the reaction rate is not affects

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Bond breaking

• is exothermic

• is endothermic

• occurs in the rate determining step

• requires the material to be a gas

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If the temperature of an equilibrium system increases

• the exothermic reaction will be favored

• the endothermic reaction will be favored

• the forward reaction is always favored

• the reverse reaction is always favored

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Reactions that occur in only one phase are

• homogenous

• heterogenous

• exothermic

• endothermic

A rate law relates

• reaction rate and temperature

• reaction rate and concentration of reactants

• temperature and concentration of reactants

• energy and concentration of reactants

Tags

NGSS.HS-PS1-5