For the reaction H2(g)+1/2 O2(g) H2 O(l), the following information is given T=300 K arrayl Delta Ho=-285 kJ mol-1 S_H2 Oo(l)=70 J K-1 mol-1 \\ S_O2 (g)=204 J K-1 mol-1 S_H2 (g)=130 J K-1 mol-1 \\ Delta S_ universe for the reaction is 2.2cm J K-1 mol-1 array

ABC26PH0857 · Thermodynamics and Thermochemistry

Subject: Physical Chemistry · Chapter: Thermodynamics and Thermochemistry · Topic: Thermodynamics & Thermochemistry – General · Exam: JAM 2001-2022 · Marks: 2 · Difficulty: Medium

For the reaction $\mathrm{H}_{2}(\mathrm{g})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{g}) \rightarrow \mathrm{H}_{2} \mathrm{O}(l)$, the following information is given $\mathrm{T}=300 \mathrm{K}$

\[ \begin{array}{l} \Delta \overline{\mathrm{H}}^{\mathrm{o}}=-285 \mathrm{kJ} \mathrm{mol}^{-1} \quad \overline{\mathrm{S}}_{\mathrm{H}_{2} \mathrm{O}}^{\mathrm{o}}(l)=70 \mathrm{J} \mathrm{K}^{-1} \mathrm{mol}^{-1} \\ \overline{\mathrm{S}}_{\mathrm{O}_{2}}^{\circ}(\mathrm{g})=204 \mathrm{J} \mathrm{K}^{-1} \mathrm{mol}^{-1} \quad \overline{\mathrm{S}}_{\mathrm{H}_{2}}^{\circ}(\mathrm{g})=130 \mathrm{J} \mathrm{K}^{-1} \mathrm{mol}^{-1} \\ \Delta \overline{\mathrm{S}}_{\text {universe }}^{\circ} \text { for the reaction is } \underline{\hspace{2.2cm}} \mathrm{J} \mathrm{K}^{-1} \mathrm{mol}^{-1} \end{array} \]

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