2.54 Transpiration

-Evaporation changes from the liquid phase to the gas phase, the heat is provided by the sunlight as the structure of the leaf absorbs the light

-Evaporation occurs through the stomatal pores

-Not all of the light is absorbed through chloroplast, absorbed through other cell structure and thus generates heat.

-In the spongy layer, there is a phase change

-The water vapor diffuses down the diffusion gradient and then through the stomatal pore