MEGA
Energy Changes
Chemical energy is associated with the arrangement of atoms that make up the molecules of the reactants and prod…
Item EC003002: During the reaction between methane and oxygen, energy is required to break bonds, and energy is given off as bonds are formed.
During the reaction between methane and oxygen, bonds between the atoms that make up the methane and oxygen molecules are broken and new bonds are formed to create carbon dioxide and water molecules.
Which of the following describes the energy involved in breaking and forming bonds?
- Energy is given off as bonds are broken, and energy is given off when bonds are formed.
- Energy is given off as bonds are broken, but energy is required to form bonds.
- Energy is required to break bonds, and energy is given off as bonds are formed.
- Energy is required to both break bonds and to form bonds.
Pre-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 532 |
6–8 n = 0 |
9–12 n = 469 |
Male n = 277 |
Female n = 196 |
English n = 444 |
Other n = 30 |
||
| A. | Energy is given off as bonds are broken, and energy is given off when bonds are formed. | 18% | NAN% | 17% | 17% | 18% | 17% | 17% |
| B. | Energy is given off as bonds are broken, but energy is required to form bonds. | 27% | NAN% | 28% | 30% | 26% | 29% | 23% |
| C. | Energy is required to break bonds, and energy is given off as bonds are formed. | 24% | NAN% | 23% | 23% | 24% | 23% | 37% |
| D. | Energy is required to both break bonds and to form bonds. | 31% | NAN% | 31% | 31% | 32% | 32% | 23% |
Post-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 532 |
6–8 n = 0 |
9–12 n = 486 |
Male n = 278 |
Female n = 200 |
English n = 449 |
Other n = 31 |
||
| A. | Energy is given off as bonds are broken, and energy is given off when bonds are formed. | 12% | NAN% | 12% | 10% | 14% | 12% | 19% |
| B. | Energy is given off as bonds are broken, but energy is required to form bonds. | 35% | NAN% | 36% | 37% | 36% | 36% | 35% |
| C. | Energy is required to break bonds, and energy is given off as bonds are formed. | 29% | NAN% | 28% | 29% | 25% | 28% | 23% |
| D. | Energy is required to both break bonds and to form bonds. | 24% | NAN% | 25% | 24% | 26% | 24% | 23% |