Using the following heat of combustions CH;OH(1) + 0,(g)CO(g) + 2H;O(1) 4,H° = -726.4 kJ mol- %3D C(graphite) + O,(g) CO(g) 4,H° = -393.5 kJ mol 4,H° = -285.8 kJ mol %3D (1)O°H (3°0 + (3)°H

Calculate the enthalpy change (in kJ/mol) for the combustion of CS2 (1) using the enthalpy values given in the table. CS₂ (1) + 302 (g) → CO₂ (g) + 2 SO2 (g) AH in kJ/mol Reaction C(s) + O₂ (g) →→→ CO₂ (g) S (s) + O₂ (g) →→→ SO₂ (g) C(s) +2S (s) →→→ CS₂ (1) −393.6 -296.8 +87.9

What is the enthalpy change for the following reaction? SiCl 4 (l)+2H 2 (g) Si(s)+4HCl(g)

Calculate the enthalpy of the following reaction: HCl + NaOH → NaCl + H2O ΔH HCl= -92.3 kJ/mol NaOH= -426.7 kJ/mol NaCl= -411 kJ/mol H2O= -286 kJ/mol Reaction: ΔH=    kJ/mol

a) Using the balanced equation and the data in the table below, calculate the theoretical enthalpy of combustion. Note: you will need to include the enthalpy of vaporisation for the liquid components which are also given. CH3OH() +1.502(g) → CO2(g) + 2H2O (1) Average Bond Enthalpies (kJ mol‍¹) C-H C-C C-O O=O C=O O-H Enthalpy of Vaporisation (kJ mol-¹) Methanol Water 412 348 358 496 743 463 35 41

7. Calculate the enthalpy of the following reaction. FL + HBr + H₂O 5 so OH Br + HI + HF

Part A Calculate the enthalpy of the reaction 2NO(9) + 02(9)→2NO2(g) given the following reactions and enthalpies of formation: A N2(g) + O2(9)→NO2(g), AfH = 33.2 kJ mol 1 B. N2 (9) + ¿O2(g)→NO(g), A;H = 90.2 kJ mol-1 Express your answer with the appropriate units. • View Available Hint(s) HA ? AfH° = Value Units

Consider the following reactions: AH = -393.5 kJ (graphite) + 2 AH = -285.8 kJ 2(g) CH,OH + 3/2 0, +2H,0 AH = -726.4 k (1) Choose... Choose... -48.25 Calculate the enthalpy change for the following reaction: 188.7 + 2 H29) CH,OH -37.6 C (graphite) + V½ 0, 10.7 -238.7 39.0 268 11.85 Given the following information: N, bond energy = 941 kJ/mol, F, bond energy = 154 kJ/mol 2 N + 3/2 F AH = -103 kJ/mol 2(g) Choose... Calculate the N-F bond energy (kJ/mol) A ballon originally had a volume of 8.68 L at 258 K and a pressure of 575 mmHg. To what temperature (in K) must the balloon be cooled to reduce its volume to 5.00 L at a pressure of 730 mmHg? Choose... V

Using the equations 2 Fe (s) + 3 CI, (g) → 2 FeCl, (s) AH° = -800.0 kJ/mol Si(s) + 2 CI, (g) → SICI, (s) AH° = -640.1 kJ/mol %3D 4 Determine the enthalpy (in kJ/mol) for the reaction 3 SICI, (s) + 4 Fe (s) → 4 FeCl, (s) + 3 Si (s) kJ/mol

1. Draw Lewis structures for ozone and for dioxygen. Using the data given below, qualitatively compare the bond enthalpies, bond orders, and bond lengths of these two compounds. O₂ (g) 20 (g) AH" = +498 kJ O(g) + O₂(g) →O, (g) AH-105 kJ