Chapter 12, Problem 12.118QP

Interpretation Introduction

Interpretation:

The following phenomenon has to be explained –

“A student heated a beaker of cold water (on a tripod) with a Bunsen burner. When the gas was ignited, she noticed that there was water condensed on the outside of the beaker.”

Concept Introduction:

When water evaporates, the molecules of water convert to vapor.  Evaporation is endothermic process.  The molecules in vapor phase revert to liquid phase which is exothermic process.  This phenomenon is called condensation.