Reaction Rates And Chemical Equilibrium Unit Test 88%

Which statement defines enzymatic activity?

According to Le Chatelier's principle, what happens when the concentration of reactants is doubled in a chemical reaction that was in equilibrium?

Consider the following equation in chemical equilibrium. C2H4(g) + H2(g) mc009-1.jpg C2H6(g) + 137 kJ What happens to the amount of ethane (C2H6) when the temperature of the system is increased?

Which statement best applies collision theory to preventing a dangerous reaction from occurring?

Consider the reaction pathway graph below. mc003-1.jpg Which letter represents the activated complex?

Which statement best describes the reaction pathway graph for an exothermic reaction but not an endothermic reaction?

A reaction occurs when solid X is placed into solution Y. As a result, the temperature of the new solution increases by 3°C. The temperature rises another 2°C when more of solid X is added to the solution. What does this indicate about the effect of adding more solid?

Consider the equation below. CaCO3(s) <-> CaO(s) + CO2(g) What is the equilibrium constant expression for the given reaction?

Which will not appear in the equilibrium constant expression for the reaction below? H2O(g) + C(s) <-> H2(g) + CO(g)

Combustion of gasoline in automobiles produces poisonous gases. Catalytic converters that contain solid platinum, palladium, and rhodium change these poisonous gases into harmless gases. Which statement describes the catalyst?

Consider the reaction. 2SO2(g) + O2(g) <-> 2SO3(g) When does the given chemical system reach dynamic equilibrium?

Consider the following reversible reaction. CO(g) + 2H2(g) <-> CH3OH(g) What is the equilibrium constant expression for the given system?

Which energy graph represents the nonspontaneous transition of graphite into diamond?

Which statement describes a homogeneous catalyst?

Consider the reaction pathway below. mc006-1.jpg Which is true about the potential energy of the reactants in this reaction pathway?

What happens as the activation energy increases?

Consider the chemical equilibrium of a soap that is present in its aqueous solution. C17H35COONa(aq) mc017-1.jpg C17H35COO-(aq) + Na+(aq) sodium stearate (soap) stearate ion What will happen if a large quantity of NaCl is added to the aqueous solution?

Which statement best describes why industry uses heterogeneous catalysts?

Consider the reaction pathway graph below. mc026-1.jpg Which method would provide evidence to support the inference that this is an exothermic reaction?

The dissociation of a weak electrolyte is suppressed when

Consider the reaction below. C2H4(g) + H2(g) mc030-1.jpg C2H6(g) Which change would likely cause the greatest increase in the rate of the reaction?

Consider the following chemical reaction at equilibrium. H2SO4(aq) mc011-1.jpg 2H+(aq) + SO42-(aq) The addition of which compound will cause a shift in equilibrium because of a common ion effect?

Which catalyzed reaction breaks up ozone?

Consider the reaction. 2NOCl(g) <-> 2NO(g) + Cl2(g) At equilibrium, the concentrations are as follows. [NOCl] = 1.4 ´ 10-2 M [NO] = 1.2 ´ 10-3 M [Cl2] = 2.2 ´ 10-3 M What is the value of Keq for the reaction expressed in scientific notation?

Consider the reaction pathway graph below. mc022-1.jpg Which inference is supported by evidence in the graph?