Forming Bonds - Quick Check

The bond energy between carbon and oxygen is 358 for a single bond (C-O) and 745 for a double bond (C=O). Why is the bond energy higher for double-bonded carbon and oxygen (C=O)?

Additional bonds require more energy to break, so the bond energy is higher.

Which statement about bonding is correct?

Forming bonds releases energy and is exothermic.

Water (H2O) has two O-H bonds. The electronegativity of oxygen is 3.5, whereas hydrogen is 2.1. Which statement best describes the type of bond this molecule has and how the electrons behave?

O-H bonds are polar covalent, and oxygen pulls the shared electrons toward it.

Which of the following happens when an ionic bond is formed?

One atom pulls an electron from another atom.

Use the bond energies to answer the question. H-H = 432H-O = 467O-O = 146O=O = 495 H2 (H-H) combines with O2 (O=O) to become hydrogen peroxide (H2O2) bonded as such: H-O-O-H. Which option shows the difference in total bond energy between the reactants and the products?

−153