Question

\[\ce{C(s) + 2H2(g) → CH4(g)}\]; ΔH= –74.8 kJ mol⁻¹. Which of the following diagrams gives an accurate representation of the above reaction?

Options

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Answer 1

Explanation:

Exothermic Reaction: The negative sign in ΔH= –74.8 kJ mol⁻¹ indicates that the reaction is exothermic (heat is released).

Energy Level of Products: In an exothermic reaction, the Products must have less energy than the Reactants because energy is lost to the surroundings.

H_R > H_P

ΔH = H_p – H_R = –ve