Which of the following process absorbs heat and which one releases heat ?
Condensation of water vapour

Answer

To determine whether the condensation of water vapor absorbs or releases heat, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Process of Condensation**:
- Condensation is the process where water vapor (gas) changes into liquid water. This occurs when the temperature of the vapor decreases or when the pressure increases.

2. **Identify the Phase Change**:
- In condensation, the phase changes from a gaseous state (water vapor) to a liquid state (water).

3. **Heat Exchange During Phase Change**:
- During condensation, the water vapor releases energy in the form of heat. This is because the molecules in the gas phase lose energy as they come together to form the liquid phase.

4. **Definition of Latent Heat**:
- The heat released during condensation is known as latent heat. It is called "latent" because it does not result in a change in temperature, but rather a change in phase.

5. **Conclusion**:
- Therefore, the process of condensation of water vapor releases heat.

### Final Answer:
Condensation of water vapor releases heat.

---