Here’s a simple explanation:
Endothermic Reaction:
- A reaction that absorbs heat (or energy) from the surroundings.
- Because energy is absorbed, the temperature of the surroundings decreases.
- In terms of enthalpy, ΔH is positive.
Examples:
- Photosynthesis in plants
- Evaporation of water
- Dissolving ammonium chloride in water
Key idea:
- Energy flows into the system → surroundings get cooler.