O Macmillan Learning Calculate the energy change of the reaction shown. Use the list of bond energies. H₂(g) + Br₂(g) → 2 HBr(g) energy change: 101 Incorrect Identify whether the reaction is exothermic or endothermic. exothermic endothermic FEB 21 tv N O Attempt 1 kJ/mol NA

Which one of the following trends appears when considering lattice energies? Anion A) The higher the charge on the ions, the higher the lattice energy. Cation F- CI- Br- |- O2- B) The more ions present in an ionic compound, the smaller the lattice energy. Lit 1036 853 807 757 2925 Na+ 923 787 747 704 2695 C) The larger the distance between ions in the ionic compound, the higher the lattice energy. K+ 821 715 682 649 2360 Mg2+ 2957 2524 2440 2327 3791 D) In general, alkali metals have larger lattice energies than alkaline earth metals with the same anions. Ca2+ 2630 2258 2176 2074 3401 Al3+ 5215 5492 5361 5217 15,916

7) Propane is a gas commonly used to fuel gas grills and camping stoves. The structure of propane is shown below. TABLE 8.4 Average Bond Enthalpies (k)/mol) Single Bonds H C-H N-H N-N N-O N-F 413 391 O-H 463 F-F 155 C-C C-N C-O O-O O-F O-CI 348 163 146 H. H. C-F 253 C-CI 242 293 201 190 358 272 203 :-F C-CI C-Br C-I 485 N-CI N-Br 200 234 H H H 328 243 Br-F 237 S-H S-F S-CI S-Br S-S Br-CI 218 Br-Br 193 276 339 327 253 218 266 Propane 240 259 H-H 436 567 431 366 299 C-S H-F H-CI H-Br H-I Si-H Si-Si 323 226 -CI I-Br 208 175 151 Si-C Si-O 301 368 Multiple Bonds C=C C=C 614 839 615 N=N NEN N-O 418 495 941 607 SO SS 523 418 891 799 1072 a) Write the balanced chemical equation for the combustion of propane. b) Draw out lewis dot structures to represent all molecules of all products and reactants in this reaction. The number of each molecule should be reflected in the balanced equation. c) Calculate the heat of combustion for propane using the bond enthalpies in the table. d) 1.00 mol of…

Determine whether each item is describing an endothermic or exothermic reaction by checking the appropriate circle : Forming new bonds Breaking bonds Boiling is Endothermic Exothermic Condensing is О О Energy is released О Energy is absorbed 6 poin

QUESTION 6 Which compound should have the lowest lattice energy? RbCl Rbl RbF RbBr Click Save and Submit to save and submit. Click Save All Answers to save all ar 854 NOV 17 atv S

the correct resonance structure are ( a&B, a&c, a&d, b&c, b&d, or c&d). The most important contributer is (H, A, B, C, D) and second most important is (H, A, B, C, D)

stion 10 of 12 > zinc Zn(s) aluminum Al(s) 2 K(s) + S(s) -> Determine whether each reactant gains or loses electrons to form an ionic compound. Fe(s) + L₂ (s) K₂ S(s) - Fel₂ (s) Resources Answer Bank loses e xove op! gains e Hillt