Problem 8.71 The longer the bond, the larger the bond enthalpy. False State whet

Question

Problem 8.71 The longer the bond, the larger the bond enthalpy. False State whether each of these statements is true or false True Submit My Answers Give Up Part B C-C bonds are stronger than C-N bonds True False Submit My Answers Give Up Part C A typical single bond length is in the 1-2 A range True False Submit My Answers Give Up Part D If you break a chemical bond, energy is released True False Submit My Answers Give Up Part E Energy is stored in chemical bonds. True False Submit My Answers Give Up

Explanation / Answer

Ans. a. False. The longer the bonds, the smaller the bond enthalpy.

#b. False. N-atom is more electronegative than C-atom. So, N-atoms draws electrons from a C-atom more strongly towards itself than a C-atom draws electrons from another C-atom.

So, C-N covalent bond is stronger than C-C bonds. Greater is the difference in electronegativity of constituents atoms in a covalent bond, stronger is the bond.

#c. True.

For example, C-H bond length = 1.09 A   ; S-S = 2.07 A

Note: Please refer to your textbook for “TYPICAL” bonds length. It’s not a standard term. So, the answer may differ depending on how the textbook defines the “TYPICAL” single bond.

#d. True. Breaking a bond releases the chemical potential energy of the bond.

#e. True. Bond formation stores chemical potential energy in the bonds being formed.

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