CH-1260
Exothermic and endothermic reactions
Chemistry · Secondary 4 · Medium · Exothermic and endothermic reactions
5.0 g of potassium bromide is dissolved in excess water. The temperature of the solution increases from 23.0 °C to 25.5 °C and the energy change is calculated as −950 J. What does the negative sign of the energy change indicate?
- Heat is released to the surroundings; the process is exothermic.
- Heat is absorbed from the surroundings; the process is exothermic.
- Heat is released to the surroundings; the process is endothermic.
- Heat is absorbed from the surroundings; the process is endothermic.
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