Chapter U3, Problem 10STP

Interpretation Introduction

Interpretation:

The phase change that occurs when a cloud forms from water vapor needs to be identified from the given options.

Concept introduction:

Matter exits in three states: solid, liquid and gas.Phase transition is a process when matter changes from one of the three states to another.Evaporation, condensation, melting and freezing are some of the common phase transition processes.

Answer to Problem 10STP

(B) Condensation.

Explanation of Solution

Evaporation is a process which involves conversion of gas into vapor. Condensation involves transition from liquid to vapor phase. Melting involves transition from solid to liquid phase.

Freezing is a process in which a liquid gets converted into a solid.

Cloud formation occurs when water vapor in the air gets converted to liquid water. Thus, formation of clouds takes place through the condensation process.

Conclusion

Condensation is the phase change that occurs when a cloud forms from water vapor.