To answer Questions 4.1-4.4, you will need the thermodynamic data pertaining to the hypothetical element “J” below. JEJ BOND BOND ENERGY BOND LENGTH J-J 350 kJ/mol 160 pm J=J 600 kJ/mol 830 kJ/mol 94 pm 68 pm 4.1. A single bond is held together by 2 electrons, while a triple bond is held together by 6 electrons. Which seems to be more important when comparin a triple bond to a single bond: increased electron-electron repulsion or increased electron-proton attraction? Use data from the table to support your answer. 4.2. Using only the bond energies given in the table, calculate AHrxn for the reaction shown below. Express your answer in kJ/mol Jo rounded to the nearest whole number and be sure to indicate whether you answer is positive or negative. –0-0 3 x JEJ –

4.3. The true strength of the bond between Ja and Jb is 475 kJ/mol. Based on this new information, what is likely to be the true strength of the bond between Jb and Jc? Express your answer in kJ/mol rounded to the nearest whole number. 4.4. Based on your answer to Q4.3 above, would you expect the true length of the bond between Jb and Jc to be longer or shorter than 94 pm? Explain your choice in terms of Coulomb’s Law.