Questions: Methane and hydrogen sulfide react to form carbon disulfide and hydrogen, like this: CH4(g) + 2 H2S(g) → CS2(g) + 4 H2(g) Suppose a mixture of CH4, H2S, CS2, and H2 has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. perturbation change in composition shift in equilibrium Some CS2 is added. The pressure of CH4 will ? The pressure of H2S will ? to the right to the left (none) Some H2S is removed. The pressure of CH4 will ? The pressure of CS2 will to the right to the left (none)

Transcript text: Methane and hydrogen sulfide react to form carbon disulfide and hydrogen, like this: \[ \mathrm{CH}_{4}(\mathrm{~g})+2 \mathrm{H}_{2} \mathrm{~S}(\mathrm{~g}) \rightarrow \mathrm{CS}_{2}(\mathrm{~g})+4 \mathrm{H}_{2}(\mathrm{~g}) \] Suppose a mixture of $\mathrm{CH}_{4}, \mathrm{H}_{2} \mathrm{~S}, \mathrm{CS}_{2}$ and $\mathrm{H}_{2}$ has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. \begin{tabular}{|c|c|c|} \hline perturbation & change in composition & shift in equilibrium \\ \hline Some $\mathrm{CS}_{2}$ is added. & \begin{tabular}{l} The pressure of $\mathrm{CH}_{4}$ will \\ $?$ \\ The pressure of $\mathrm{H}_{2} \mathrm{~S}$ will \\ $?$ \end{tabular} & to the right to the left (none) \\ \hline Some $\mathrm{H}_{2} \mathrm{~S}$ is removed. & \begin{tabular}{l} The pressure of $\mathrm{CH}_{4}$ will \\ $?$ \\ The pressure of $\mathrm{CS}_{2}$ will $\square$ \end{tabular} & to the right to the left (none) \\ \hline \end{tabular}