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- How do I (a) determine the energy change in the following reaction2 O2 + CH4→ CO2 + 2 H2Ogiven the following bond dissociation energies:C-C 340kJ/mol; C-H 420kJ/mol; O=O 490 kJ/mol; O-H 460 kJ/mol; C=O 720 kJ/mol. (b) Is the reaction exothermic or endothermic? Explaination?18. (a) Molecule N₂H4 (1) + 2 H₂O2 (1) → N2(g) + 4 H₂O (1) Complete the following table: Lewis Dot Structure (use dots or lines to show bonds) (b) (c) (d) N₂H4 H₂O2 N₂ H₂O Calculate the AH°rxn using average bond energies (Table 9.4 in textbook) Calculate the AH°rxn using the standard enthalpies of formation (Appendix 2 in textbook) Why are these two values slightly different?Br₂ H2O OH Br
- CH,(9) + 2 O,(g) AH = -809.0 kJ/mol Co,(9) + 2 H,O(g) ΔΗ. cond = -81.3 kJ 2 H,0(/) Given the energy diagram above, what is AH when 0.5 mol of methane is combusted? -802.3 kJ +802.3 kJ -1604.6 kJ +401.15 kJ +1604.6 kJ -401.15 kJ4G VOLTE O 76 14 4:58 7 February 2021 4:57 PM (ii) Calculate the lattice energy of Silica oxide (SiO2) from the data given below: Si (g) - Si (s) AH° = -454 kJ mol-1 S1A+ (E) + 4e" Si (3) AH° = -9949 kJ mol-1 20 (g) – 02 (3) AH° = -498 kJ mol-1 02 (3) 0 (g) + 2e AH° = -737 kj mol-1 Si (s) + 02 (3) → SiO2 (s) s14+ (6) - 202- (3) – SiO2 (s) AHf (SIO2)= -910.9 kj mol1 AH°lattice = ? Share Favourite Edit Delete MoreWhat is the purpose of the hexane in the halogen displacement? Intowhich layer (water or hexane) would the following species reside?Cl‐, I2, Cl2, Br‐, I‐, Br2
- ou must show your entire work on a separate sheet hapter 5 Balance the following Chemical Reactions: CH;CH 0:- CO: H;O+ Ch Cl2 02%D H2O+ co H2O+ CO23D 3> Cı2H22O11+ 027. Identify the relation between the two molecules in each of the following four sets of molecules. (B) Br (A) Br. H (C) Br. H Br H Br H CI Br CI Br CI Br. CI CI H H Br CI H H H (D) Br H CI Br CI CI H H BrCalculate the change in enthalpy for the reaction between NaHCO3 and C6H8O7 given these conditions: Weight of NaHCO3 = 4.0690g Volume of 1.5M C6H8O7 = 30.0mL qrxn = +1300J ti = 21.9oC tf = 13.0oC delta t = -8.9oC
- Calculate AH for the following reaction, FeO(s) + CO(g) -----> Fe(s) + CO2(g), from the following data, Fe2O3(s) + 3CO(g) -----> 2Fe(s) + 3CO2(g) 3Fe2O3(s) + CO(g) > 2FE3O4(s) + CO2(g) Fe;O4(s) + CO(g) AH = -23 KJ AH = -39 KJ --- -- -----> 3FeO(s) + CO2(g) AH =+18 KJ %3DA chemist, during the course of an analysis, runs across a chemical composed of carbon, hydrogen, and oxygen in the proportion 1:2:1 and having a six-sided molecular shape. It is probably (a) a pentose, (b) an amino acid, (c) a fatty acid, (d) a monosaccharide, (e) a nucleic acid.What is an expected product of the following reaction? HBr Br -Br G ?