Conceptual Physics Alive: Heat: Change of Phase

Conceptual Physics Alive: Heat: Change of Phase includes a digital video and questions set with answers. Observe Paul Hewitt teach in a classroom with real students, using engaging demonstrations and artwork. In this video, the concepts of evaporation and condensation are contrasted. The energy transfer that accompanies changes of state is related to everyday examples. Segment length: 46 minutes Heat: Change of Phase Includes: Evaporation is introduced with a skit about massaging with alcohol. Graph of molecules versus relative numbers of molecules in a container of water. Evaporation and molecular speed. Example of evaporation: Indian child keeping a jug of water cool. Examples of cooling by evaporation: dogs panting, pigs wallowing in the mud, people perspiring. Hewitt's experience in a hot tub where evaporation was prevented and overheating of the body, rather than cooling, occurred. Boiling and cooling. Hewitt shows a pressure cooker and explains how boiling and therefore cooling