Question

Questions 15: 3 points each. 15. enthalpy valence electron heat isoelectronic A) Energy in transit due to a temperature difference between objects B) Atoms or elements that have the same electron configurations C) Electron in the outermost shell of an atom D) The heat content of a system at constant pressure Problem Solving Questions. Circle your final answer. 16. (5 pts.) Write the electron configuration for a aluminum ion (AP) 17. (5 pts.) Draw a shell (Bohr) model atom of sulfur (S). Be sure to include the number of protons and neutrons. Assume a mass number of 32. 18. (8 pts.) Given the standard enthalpies of formation for the following substances, determine the change in enthalpy for the combustion of butane. 2C-H108)+1302(E)-8CO2(g) + 10H2O(g) Substance C. Hg) CO2(g) H2O(g) AH, in kJ/mol -124.7 -393.5 -241.8

Answer 1

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15. | 16. enthalpy A13t 12. (D2 Valence e- (c) heat (A) Isoelectronic (B) 18² 2s²2p6 Nuclows contain 16 p = 16 proton lon = 16 neutron 6 valence e- of combustion butance = f combustion balance = 8 xay_c02 +1094, 480]-[2044C440 = [${[-393.5] + 10x(+241-) [2« (+1242)] +5316.6 kJ/mol tombustion