Exam 3 Form D Key fall 07CHEM103A Dr. Keller

Exam 3 Form D Key fall 07CHEM103A Dr. Keller - C C Cl Cl +...

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Unformatted text preview: C C Cl Cl + H H H Cl C C H H H H H H + 2 4 Chemistry 103A Exam 3, Form D Answer Key 1. Use the bond energies in the table on the last page to calculate the enthalpy of reaction for the gas phase reaction below. CF 4 + H 2 CH 4 + HF (a) +27 kJ (b) -616 kJ (c) -854 kJ (d) -372 kJ (e) -482 kJ 2. (2) Determine the Lewis structure of the compound below and choose the number of shared (bonds) and unshared electron pairs. The atoms are connected as shown. The octet rule must be obeyed. HCNO (a) 5 shared, 3 unshared (b) 4 shared, 4 unshared (c) 6 shared, 2 unshared (d) 7 shared, 1 unshared (e) none of these 3. Use the bond energies in the table on the last page to calculate the enthalpy of reaction for the gas phase reaction below. (a) -232 kJ (b) -87 kJ (c) +380 kJ (d) +244 kJ (e) -434 kJ 4. (2) Determine the Lewis structure of the compound below and choose the number of shared (bonds) and unshared electron pairs. The atoms are connected as shown. The octet rule must be obeyed. CO (a) 1 shared, 4 unshared (b) 4 shared, 1 unshared (c) 2 shared, 2 unshared (d) 3 shared, 2 unshared (e) none of these C C F C C F C C F C C F C C F C C F C C F C C F C C F C C F (a) (b) (c) (d) (e) 5. (2) Which molecule is 5....
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Exam 3 Form D Key fall 07CHEM103A Dr. Keller - C C Cl Cl +...

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