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  4. A reaction proceeds through two paths I and II to convert X → Z. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/54e93ce7d808f537f4586e76bc79b23e-.jpeg /> What is the correct relationship between Q, Q1 and Q2 ?

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Q. $A$ reaction proceeds through two paths $I$ and $II$ to convert $X \to Z$.
image
What is the correct relationship between $Q$, $Q_1$ and $Q_2$ ?

Thermodynamics

Solution:

Hess's Law of Constant Heat Summation (or just Hess's Law) states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes.