ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG182001: Measuring an decrease in temperature during a chemical reaction is an indicator that the amount of chemical energy increases.
A student combines Substance X with Substance Y. The two substances react completely to form Substance Z. The student measures a decrease 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]) - 521
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 383 | 1226 | 31% |
| Grades | |||
| 4–5 | N/A | N/A | N/A |
| 6–8 | 220 | 638 | 34% |
| 9–12 | 163 | 588 | 28% |
| Gender | |||
| Male | 174 | 593 | 29% |
| Female | 198 | 610 | 32% |
| Primary Language | |||
| English | 320 | 1036 | 31% |
| Other | 51 | 153 | 33% |
- Disciplinary Core Ideas
- PS1.B Some chemical reactions release energy, others store energy.