- Take 10 mL water in a beaker.
- Add a few drops of concentrated H2SO4 to it and swirl the beaker slowly.
- Touch the base of the beaker.
- Is there a change in temperature?
✅ Answer: Yes. It becomes hot.
- Is this an exothermic or endothermic process?
✅ Answer: Exothermic.
- Repeat the above Activity with sodium hydroxide pellets and record your observations.
✅ Answer: It is also an exothermic reaction.