PS Ch 7 Review

Front

The formation of chemical bonds _____ energy.

Back

releases

Front

C₃H₈ + 5O₂ ---> 3CO₂ + 4H₂O + heat. This reaction is an _____ reaction.

Back

exothermic reaction

Front

If we added heat to a system at equilibrium, the equilibrium would shift to _____ the amount of ammonia.

Back

decrease

Front

Stirring the reactants will generally _____ the reaction rate.

Back

increase

Front

Which of the following is a balanced chemical equation for the synthesis of NaBr from Na and Br₂? 2Na + Br₂ --> 2NaBr. This equation is an example of _____ reaction.

Back

synthesis reaction

Front

What is the definition of an exothermic reaction?

Back

A reaction that releases heat energy.

Front

What is the definition of an endothermic reaction?

Back

A reaction that absorbs heat energy.

Front

What does it mean for a chemical equation to be balanced?

Back

It means that the number of atoms for each element is the same on both sides of the equation.

Front

What is the effect of increasing temperature on an exothermic reaction at equilibrium?

Back

It shifts the equilibrium to the left, decreasing the amount of products.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst increases the reaction rate without being consumed in the reaction.