Problem: Ethane, C 2H 6, can be formed by reacting acetylene, C 2H 2, with hydrogen gas as follows:        C 2H 2(g) + H 2(g) ⇌ C 2H 6(g)   Exothermic        What change will be observed if the temperature of the reaction mixture at equilibrium were increased?    A)    The concentration of C 2H 6 will increase.    B)    The concentration of both C 2H 2 and H 2 will increase.    C)    The concentration of both C 2H 2 and H 2 will decrease.    D)    The concentration of H 2 only will decrease.    E)    There will be no change in the equilibrium concentrations. 

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FREE Expert Solution

The reaction of ethylene (C2H2) with hydrogen gas (H2) is an exothermic reaction

When a reaction is exothermic, the system or the reaction is releasing heat to the surroundings.

 The reaction with the heat would be:

 C2H2(g) + H2(g)  C2H6(g) + heat

**Note that the heat will be part of the product

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Problem Details

Ethane, C 2H 6, can be formed by reacting acetylene, C 2H 2, with hydrogen gas as follows:

        C 2H 2(g) + H 2(g) ⇌ C 2H 6(g)   Exothermic

        What change will be observed if the temperature of the reaction mixture at equilibrium were increased?

    A)    The concentration of C 26 will increase.

    B)    The concentration of both C 2H 2 and H 2 will increase.

    C)    The concentration of both C 2H 2 and H 2 will decrease.

    D)    The concentration of H 2 only will decrease.

    E)    There will be no change in the equilibrium concentrations.

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