ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG173002: An increase in temperature indicates that the amount of chemical energy decreased during the reaction.
A student combines Substance X with Substance Y. The two substances react completely to form Substance Z. The student measures an increase in temperature as the reaction occurs. What happens to the amount of chemical energy during the chemical reaction?
- The amount of chemical energy decreases during the chemical reaction.
- The amount of chemical energy increases during the chemical reaction.
- The amount of chemical energy does not change during the chemical reaction.
- The only way to determine what happens to the amount of chemical energy is to also know the identity of the substances.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 564
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 238 | 1443 | 17% |
| Grades | |||
| 4–5 | N/A | N/A | N/A |
| 6–8 | 125 | 803 | 16% |
| 9–12 | 113 | 640 | 18% |
| Gender | |||
| Male | 118 | 695 | 17% |
| Female | 110 | 717 | 15% |
| Primary Language | |||
| English | 221 | 1317 | 17% |
| Other | 11 | 101 | 11% |
- Disciplinary Core Ideas
- PS1.B Some chemical reactions release energy, others store energy.