IRespond Question F Multiple Choice A.) solid B.) liquid C.) gas D.) E.)ġ6 If a system is left to change spontaneously, in what state will it end? IRespond Question F Multiple Choice A.) A B B.) A 2B More stuff, more disorder C.) 2A B D.) 3A B E.)ġ5 Which physical state of nitrogen has the highest entropy? IRespond Question F Multiple Choice A.) air escaping from a tire B.) snow melting C.) salt dissolving in water D.) a liquid cooling E.)ġ4 Which reaction results in the greatest increase in entropy? E.)ġ3 In which of these systems is the entropy decreasing? IRespond Question Multiple Choice F The system shift away from what you add A.) The reaction makes more products. D.) The answer cannot be determined E.)ġ2 What happens to a reaction at equilibrium when more reactant is added to the system? IRespond Question Multiple Choice F Increasing temperature favors the reaction that requires heat (endo) A.) The reaction makes more products. E.)ġ1 In an endothermic reaction at equilibrium, what is the effect of raising the temperature? C.) The equilibrium is pushed in the direction of reactants. E.)Ĩ At equilibrium, what is the rate of production of reactants compared with the rate of production of products? iRespond Question F Multiple Choice A.) much higher B.) higher C.) the same D.) lower E.)ĩ Which of the changes listed below would shift the following reaction to the right?ĤHCl(g) + O2(g) ↔ 2Cl2(g) + 2H2O(g) iRespond Question F Multiple Choice A.) addition of Cl2 B.) removal of O2 C.) increase of pressure 5 gas ↔ 4 gas D.) decrease of pressure E.)ġ0 What is the effect of adding more water to the following equilibrium reaction?ĬO2 + H2O ↔ H2CO3 iRespond Question Multiple Choice F Shift right, causing an increase in product concentration A.) More H2CO3 is produced. C.) It is incorporated into the reactants. B.) It is incorporated into the products. IRespond Question F Multiple Choice A.) It is unchanged. E.)ħ What happens to a catalyst in a reaction? D.) There are more collisions per second and the collisions are of greater energy. C.) The activation energy is lowered only. B.) The collisions occur with greater energy only. IRespond Question F Multiple Choice A.) There are more collisions per second only. E.)ĥ Why does a higher temperature cause a reaction to go faster?Ħ Why does a catalyst cause a reaction to proceed faster? D.) There are more collisions per second or the collisions are of greater energy. C.) There are more collisions per second and the collisions are of greater energy. B.) Collisions occur with greater energy only. The reaction rate can be increased by using 5.0 grams of powdered zinc instead of a 5.0-gram strip of zinc because the powdered zinc has iRespond Question F Multiple Choice A.) lower kinetic energy B.) lower concentration C.) more surface area D.) more zinc atoms E.)Ĥ Why does a higher concentration make a reaction faster? IRespond Question F Multiple Choice A.) the particles are heated B.) the atmospheric pressure decreases C.) there is a catalyst present D.) there are effective collisions between the particles E.) Complex E D.) 4 PE Products E.) 5 Heat of Reaction EndothermicĢ A chemical reaction between iron atoms and oxygen molecules can only occur if Is it endothermic or exothermic? F Multiple Choice iRespond Question A.) 1 Activation Energy B.) 2 PE Reactants C.) 3 PE Act. Presentation on theme: "Which arrow represents the activation energy? What are the others?"- Presentation transcript:ġ Which arrow represents the activation energy? What are the others?
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