Regents Chemistry Test Preparation Practice

    Kinetics Equilibrium

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    Base your answers to questions 13 on the information below and your knowledge of chemistry.

    Methanol can be manufactured by a reaction that is reversible. In the reaction, carbon monoxide gas and hydrogen gas react using a catalyst. The equation below represents this system at equilibrium.

    CO(g) + 2H2(g) ⇌ CH3OH(g) + energy

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    Base your answers to questions 14 on the information below and on your knowledge of chemistry.

    Millions of tons of ammonia are produced each year for use as fertilizer to increase food production. Most of the hydrogen needed to produce ammonia comes from methane gas reacting with steam. This reaction, which occurs in a container under controlled conditions, is shown below in unbalanced equation 1.

    Equation 1: CH4(g) + H2O(g) + energy → CO(g) + H2(g)

    The reaction that produces ammonia is represented by balanced equation 2, shown below. A catalyst can be used to increase the rate of the reaction.

    Equation 2: N2(g) + 3H2(g) → 2NH3(g) + energy

    A potential energy diagram for equation 2 is shown below.

    chemical-reactions-and-equations fig: chem82017-exam_g20.png

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    Base your answers to questions 15 on the information below and on your knowledge of chemistry.

    Carbon monoxide, CO(g), is a toxic gas found in automobile exhaust. The concentration of CO(g) can be decreased by using a catalyst in the reaction between CO(g) and O2(g). This reaction is represented by the balanced equation below.

    collision-theory-and-the-rate-of-reaction fig: chem12017-exam_g16.png

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