(Solved): Heat Evolved During Combustion Consider the following reaction: 2Mg(s)+O2(g)2MgO(s) Use stand ...

Heat Evolved During Combustion Consider the following reaction: $2\mathrm{Mg}(\mathrm{s})+{\mathrm{O}}_2(g)?2\mathrm{MgO}(\mathrm{s})$ Use standard heats of formation from Zumdahl 'Chemical Principles' 8th ed. Appendix Four pp A19 - A21. How much heat is evolved when $2.057\times 10^1$ moles of $\mathrm{Mg}(\mathrm{s})$ is burned in excess oxygen. Answer to 4 sig figs. Assume standard conditions. Note that, by convention, a decrease in enthalpy of the system will result in a positive quantity of heat being evolved. 1 pts Tries 5/5 Previous Tries How much heat is evolved when $1.000\times 10^2\mathrm{g}$ of $\mathrm{MgO}(\mathrm{s})$ is produced from the combustion of $\mathrm{Mg}(\mathrm{s})$. Answer to 4 sig figs. 1 pts Tries 3/5 Previous Tries How much heat is evolved when $1.094\times 10^2\mathrm{g}$ of $\mathrm{Mg}(\mathrm{s})$ is burned in excess oxygen. Answer to 4 sig figs. 1 pts Tries 2/5 Previous Tries