(Solved): Use standard enthalpies of formation to calculate Hrxn for the following reaction: 2H2 ...

Use standard enthalpies of formation to calculate $$?H_{\mathrm{rxn}}^{?}$$ for the following reaction: $$2{\mathrm{H}}_2\mathrm{S}(\mathrm{g})+3{\mathrm{O}}_2(\mathrm{g})?2{\mathrm{H}}_2\mathrm{O}(\mathrm{l})+2{\mathrm{SO}}_2(\mathrm{g})$$ Express your answer using four significant figures. Use standard enthalpies of formation to calculate $$?H_{\mathrm{rxn}}^{?}$$ for the following reaction: $$\mathrm{C}(\mathrm{s})+{\mathrm{H}}_2\mathrm{O}(\mathrm{g})?\mathrm{CO}(\mathrm{g})+{\mathrm{H}}_2(\mathrm{g})$$ Express your answer using four significant figures. Use standard enthalpies of formation to calculate $$?H_{\mathrm{rxn}}^{?}$$ for the following reaction: $$\mathrm{CaO}(\mathrm{s})+{\mathrm{CO}}_2(\mathrm{g})?{\mathrm{CaCO}}_3(\mathrm{s})$$ Express your answer using four significant figures.