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.
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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