Use standard enthalpies of formation in Appendix L to calculate enthalpy changes for the following:

(a) 0.054 g of sulfur burns, forming SO₂(g)

(b) 0.20 mol of HgO(s) decomposes to Hg(ℓ) and O₂(g)

(c) 2.40 g of NH₃(g) is formed from N₂(g) and excess H₂(g)

(d) 1.05 × 10⁻² mol of carbon is oxidized to CO₂(g)

Data given in Appendix L