Enthalpy of Reaction — Unit test Answers

Which statement is usually true about the relationship between activation energy and reaction rates?

The equation below shows a reaction that produces calcium carbonate.Ca(OH)2(s) + CO2(g) CaCO3(s) + H2O(l)Which describes a way to speed up the collisions between calcium hydroxide and carbon dioxide molecules to produce calcium carbonate faster?

Consider the reaction below.H2(g) + CO2(g) H2O(g) + CO(g)At equilibrium at 600 K, the following are true. [CO2] = 9.5 x 10-4 M[H2] = 4.5 x 10-2 M[H2O] = 4.6 x 10-3 M[CO] = 4.6 x 10-3 MWhat is the value of the equilibrium constant for this reaction in correct scientific notation?

How does an increase in reactant concentration affect the rate of reaction?

Which statement best describes how dynamic equilibrium relates to a saturated solution of sodium chloride?

According to Le Chatelier’s principle, a change in pressure affects the chemical equilibrium of the reaction system under what condition?

Which is true about reaction rates?

Consider the chemical equation in equilibrium. A(g) + 2B(g) C(g) + D(g) + heat What will happen to the equilibrium of this reaction if the temperature is increased?

Consider the following chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its dissociated aqueous solution. HC2H3O2(aq) H+(aq) + C2H3O2–(aq)yellow blue What will be the color of the solution if a large amount of H2CO3 is added?

Consider the reaction.At 298 K, the equilibrium concentration of O2 is 1.6 x 10-2 M, and the equilibrium concentration of O3 is 2.86 x 10-28 M. What is the equilibrium constant of the reaction at this temperature?

According to Le Chatelier’s principle, what happens when the concentration of a product is reduced in a chemical reaction that was in equilibrium?

In the hypothetical reaction below, substance A is consumed at a rate of 2.0 mol/L·s. If this reaction is at dynamic equilibrium, at what rate will substance B be consumed?A B