Question

Helpful steps,What is the enthalpy change for the reactions? (image attached)

Answer 1

\(Z\rightarrow X\); \(\Delta H_1\)
\(X\rightarrow S\); \(\Delta H_2\)


\(X\rightarrow Z\); \(-\Delta H_1\)

\(2Z\rightarrow 2X\); \(2\Delta H_1\)

\(Z\rightarrow S\); \(\Delta H_{total}=\Delta H_1+\Delta H_2\)

Answer 2

Thanks!