For the energy profiles shown below, which statement is true

For the energy profiles shown below, which statement is true



For the energy profiles shown below, which statement is true?

Reaction Z has 1 intermediate and 2 transition states


> Reaction X has the same activation energy

in both the forward and reverse directions.

> Reaction Z has 1 intermediate and 2 transition states.

> Reaction W has the largest rate constant in the forward direction.

> Reaction Y is exothermic.



> Reaction X has the same activation energy

in both the forward and reverse directions.

---> 역반응의 Ea가 더 크다.


▶ 발열 반응인 경우,

역반응의 Ea > 정반응의 Ea

( 참고 https://ywpop.tistory.com/15 )



> Reaction Z has 1 intermediate and 2 transition states.

( 참고 https://www.organicchemistrytutor.com/topic/what-is-the-difference-between-a-transition-state-and-an-intermediate/ )



> Reaction W has the largest rate constant in the forward direction.


가장 큰 속도 상수 = 가장 낮은 활성화 에너지

( 참고 https://ywpop.tistory.com/7288 )


활성화 에너지가 2개 이상이면,

가장 높은 활성화 에너지 준위와

반응물의 에너지 준위 차이가

전체 반응(정반응)의 활성화 에너지이다.


Z 반응의 활성화 에너지는 125 kJ이고,

Y 반응의 활성화 에너지는 100 kJ보다 크고,

W 반응의 활성화 에너지는 100 kJ이고,

X 반응의 활성화 에너지는 75 kJ이다.



> Reaction Y is exothermic.

---> 발열(exothermic)이 아닌 흡열(endothermic)



답: > Reaction Z has 1 intermediate and 2 transition states.




[키워드] 활성화 에너지 기준



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