Ch.14 - Chemical EquilibriumWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: 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

Solution: 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

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 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.

 

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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