Chem 1465 1st EditionExam # 3 Study Guide Lectures: 10-141. Identify if the following is endothermic or exothermic.a. Ice cube melts:b. Wood burning a fire:c. Water freezing:2. Identify the bond angles for the VSEPR models.a. Linear:b. Tetrahedral:c. Octahedral: 3. State if the molecule is polar or nonpolar.a. H2O :b. NH4+ :c. XeF4 :4. Know the difference between condensation and addition polymers. Addition polymers have double bonds that form the polymer and condensation polymers occur whenever any small molecule is released. 5. Draw the correct Lewis dot structures for the following molecules and identify which molecules requires a resonance structure, then draw the resonance structure. a. SeO32- b. HCNc. SF5+ 6. An iron bolt of 10g at 100 degrees Celsius is placed in a 30 g cup of water at 55 degrees Celsius. Assuming no heat was lost, what is the final temperature of the mixture is the specific heat of iron is .45 J/gK7. Calculate ΔH for: Ca + ½O2 + CO2 → CaCO3Given: Ca + ½O2 → CaO ΔH= -635.1 KJ and CaCO3 → CaO + CO2 ΔH= 178.3 KJ8. When 1 mole of KBr decomposes into tis elements, 394 KJ of heat are absorbed. Write a balanced thermochemical equations and find ΔH when 10 kg of KBr forms from its elements.9. A chemist burns .9g of graphite (a form of carbon) in a bomb calorimeter, and CO2 forms.If 393.5 KJ of heat is released per mole of graphite and the change in temperature is 2.7 K, what is the heat capacity of the bomb
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