Use Hess's law to calculate the standard heat of the water-gas shift reaction CO(g) + HzO(v) -+ COz(g) + H2(g) from each of the two sets of data given here. (a) CO(g) + HzO(I) --. COz(g) + Hz(g): !:lil~ = +1226 Btu/lb-mole HzO(1) --. HzO(v): !:lHv = +18,935 Btu/lb-mole (b) CO(g) + Oz(g) --. COz(g): !:lH~ = -121,740 Btu/lb-mole Hz(g) + i Oz(g) --. HzO(v): !:lH~ = -104,040 Btu/lb-mole
Chapter 4 VII. drawing Lewis dot structures for polyatomic ion A. the charge of the ion should be taken into account when placing the valence electrons B. Sulfate will have two extra valence electrons because it has a -2 charge VIII. resonance- when two or more electron dot structures can be written with multiple bonds A. hybrid= mix of two structures IX. properties of ionic bonds: solid at room temperature, high melting and billing point, good conductors, no prefixes, are metals and non-metals, transfer electrons Properties of covalent bonds: solids, gases or liquids at room temperature, low melting and boiling point, non-conductors, uses prefixes, 2 non-metals, shared electrons
