Question
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)?
A. Additional electrons repel each other, increasing the distance between atoms, and increasing bond energy
B. Additional bonds require more energy to break, so the bond energy is higher
C. Additional electrons attract each other, decreasing the distance between atoms, and increasing bond energy
D. Additional bonds require less energy to break, so the bond energy is higher
A. Additional electrons repel each other, increasing the distance between atoms, and increasing bond energy
B. Additional bonds require more energy to break, so the bond energy is higher
C. Additional electrons attract each other, decreasing the distance between atoms, and increasing bond energy
D. Additional bonds require less energy to break, so the bond energy is higher
Answers
GPT-4o mini
The correct answer is **C. Additional electrons attract each other, decreasing the distance between atoms, and increasing bond energy**.
In a double bond (C=O), there are two pairs of electrons shared between the carbon and oxygen atoms compared to a single bond (C-O), which has one pair of electrons. The presence of an additional pair of electrons in a double bond leads to a stronger attraction between the positively charged atomic nuclei and the negatively charged shared electrons. This increased electron density between the atoms pulls them closer together, resulting in a shorter bond length and a higher bond energy because it takes more energy to break this stronger interaction than it does to break a single bond.
In a double bond (C=O), there are two pairs of electrons shared between the carbon and oxygen atoms compared to a single bond (C-O), which has one pair of electrons. The presence of an additional pair of electrons in a double bond leads to a stronger attraction between the positively charged atomic nuclei and the negatively charged shared electrons. This increased electron density between the atoms pulls them closer together, resulting in a shorter bond length and a higher bond energy because it takes more energy to break this stronger interaction than it does to break a single bond.