Problem: What is ΔHrxn° for the following chemical reaction? CS2(g) + 2H2O(l) → CO2(g) + 2H2S(g) You can use the following table of standard heats of formation (ΔH f°) to calculate the enthalpy of the given reaction.Express the standard enthalpy of reaction to three significant figures and include the appropriate units.

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FREE Expert Solution

Recall that the equation for ΔH°rxn is: 

$\boxed{\mathbf{∆}\mathit{H}{\mathbf{°}}_{\mathbf{rxn}}\mathbf{=}\mathbf{\left(}\mathit{p}\mathit{r}\mathit{o}\mathit{d}\mathit{u}\mathit{c}\mathit{t}\mathit{s}\mathbf{\right)}\mathbf{-}\mathbf{\left(}\mathit{r}\mathit{e}\mathit{a}\mathit{c}\mathit{t}\mathit{a}\mathit{n}\mathit{t}\mathit{s}\mathbf{\right)}}$

For this problem, we need to solve for ΔH°rxn for the reaction: 

CS₂(g) + 2H₂O(l) → CO₂(g) + 2H₂S(g)

Upon checking, the equation is balanced. 

We will use the following table for the standard heats of formation, ΔH°_f :