Question

im kinda confused on the imagine below, its just jibberish to me

Answer 1

1) Write the chemical equations.

1.1-The chemical equation result.

$A+B\rightarrow C$

1.2-The chemical equation steps.

$2A+B\rightarrow D\text{ }(\Delta H_1^0)$$C+A\rightarrow D\text{ }(\Delta H_2^0)$

2) Invert the second step.

$D\rightarrow C+A\text{ }(-\Delta H_2^0)$

3) Sum up the equation steps.

$\begin{gathered} 2A+B\rightarrow D \\ D\rightarrow C+A \end{gathered}$$A+B\rightarrow C$

Enthalpy change

$\Delta H^0=\Delta H_1^0-\Delta H_2^0$

Option C.

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