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ladessa [460]
2 years ago
12

Which profile best describes the reaction C(s) + 2H2(g) → CH4(g), AH = -74.9 kJ?

Chemistry
2 answers:
katrin [286]2 years ago
8 0

Answer:

Option B. A

Explanation:

From the question given above, the following data were obtained:

C(s) + 2H₂ (g) —> CH₄ (g). ΔH = –74.9 kJ

From the reaction above, we can see that the enthalpy change (ΔH) is negative (i.e –74.9 KJ) which implies that the heat content of the reactants is greater than the heat content of the products. Thus, the reaction is exothermic reaction.

For an exothermic reaction, the energy profile diagram is drawn in such a way that the heat content of reactants is higher than the heat content of products because the enthalpy change

(ΔH) is always negative.

Thus, diagram A (i.e option B) gives the correct answer to the question.

enyata [817]2 years ago
3 0

Answer:

B. A

Explanation:

Graph A, I just took a quiz on  a p e x  and it was correct!:)

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