AP Chemistry
2.2 Intramolecular Force and Potential Energy
2.1 Types of Chemical Bonds
A student compares the physical properties of silicon dioxide, \(\text{SiO}_2\text{(s)}\), and carbon dioxide, \(\text{CO}_2\text{(s)}\). The student notes that \(\text{SiO}_2\text{(s)}\) has a melting point of \(1710^\circ\text{C}\), whereas \(\text{CO}_2\text{(s)}\) sublimes at \(-78^\circ\text{C}\) at atmospheric pressure. Which of the following statements best accounts for the large difference in phase-change temperatures between the two substances?
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