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Class 1
Three-Phase Model of Matter
How do we change the phase or temperature of matter? | adding or removing energy (ex: transfer it through heat) |
Energy Interaction Diagrams | shows how energy interacts between substances |
Energy Forms | Thermal, Bond, Kinetic, Potential (gravity), and Potential (spring) |
Indicators of energy transfer | For thermal energy: temperature; For bond energy: amount of substance in a "higher" phase (between initial and final phase) |
How do you set up an Energy Interaction Diagram? | Define system Define interval, Track indicator and energy changes Open or closed system Energy Equation |
System: H20 (initial = -10C, final = 15C) How can we model how much energy is needed to melt ice initiatlly at -10C, and bring it to 15C | Note each phase and temp change for the substance: Ice. Thermal Energy. (initial -10C and final 0C); Mixed. Bond Energy. (initial all solid and final all liquid) Water. Thermal Energy. (initial 0C and final 15C |