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# . S1: $\Delta H$ of a reaction is independent of temperature.  S2: $\Delta H^{\circ}$ of a reaction = $\sum H^{\circ}$(Products) - $\sum H^{\circ}$(Reactants)

$\begin {array} {1 1} (A)\;\text{If both S1 & S2 are correct and S2 is correct explanation of S1.} \\ (B)\;\text{If both S2 & S1 are correct but S2 is not correct explanation of S1.} \\ (C)\;\text{If S1 is correct but S2 is wrong.} \\ (D)\; \text{If S1 is wrong but S2 is correct.} \end {array}$

$\Delta H$ depends on temperature of the surrounding, products, reactants, etc.