Concept explainers
Acetylene (C2H2) and nitrogen (N2) both contain a triple bond, but they differ greatly in their chemical properties.
a. Write the Lewis structures for the two substances.
b. By referring to Appendix C, look up the enthalpies of formation of acetylene and nitrogen. Which compound is more stable?
c. Write balanced chemical equations for the complete oxidation ofN2 to form N205(g) and of acetylene to form C02(g) and H20(g).
d. Calculate the enthalpy of oxidation per mole for N2 and for C2H2 (the enthalpy of formation of N205(g) is 11.30k.J/m01).
e. Both N2and C2H2 possess triple bonds with quite high bond enthalpies
(Table 8.3 C).
Calculate the enthalpy of hydrogenation per mole for both compounds:acetylene plus 1-12 to make methane, CH4; nitrogen plus H2 to make ammonia, NH3.
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MAST F/ CHEM: THE CENTRAL SCI CODE ALON
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- a) b) Provide arrows to show the mechanisms and then predict the products of the following acid base reaction. Use pKas to determine which way the reaction will favor (Hint: the lower pka acid will want to dissociate) Дон OH Ha OH NH2 c) H H-O-Harrow_forwardMATERIALS. Differentiate between interstitial position and reticular position.arrow_forwardFor each of the following, indicate whether the arrow pushes are valid. Do we break any rules via the arrows? If not, indicate what is incorrect. Hint: Draw the product of the arrow and see if you still have a valid structure. a. b. N OH C. H N + H d. e. f. مه N COHarrow_forward
- Decide which is the most acidic proton (H) in the following compounds. Which one can be removed most easily? a) Ha Нь b) Ha Нь c) CI CI Cl Ha Ньarrow_forwardProvide all of the possible resonanse structures for the following compounds. Indicate which is the major contributor when applicable. Show your arrow pushing. a) H+ O: b) c) : N :O : : 0 d) e) Оarrow_forwardDraw e arrows between the following resonance structures: a) b) : 0: :0: c) :0: N t : 0: بار Narrow_forward
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