Concept Map
- 1. Flora is boiling water on a stove. She turns the temperature dial up to high to boil the water. The water is boiling vigorously with large bubbles quickly forming and bursting at the surface. Flora then turns the dial of the stove down to low. The water is boiling gently, with smaller bubbles slowly forming and bursting at the surface. Flora wonders if the boiling temperature changes when she turns down the dial. What would you tell Flora? A. The boiling temperature is greater when the dial is set at high. B. The boiling temperature is greater when the dial is set at low. C. The boiling temperature is the same at both settings.
- 2. Freezing Water -15 -10 -5 0 5 10 15 20 25 0 2 4 6 8 10 12 14 16 18 Time (min.) Temperature(C) Liquid, cooling, sensible heat Freezing, latent heat Solid Super cooled, liquid ?
- 3. Water The most important compound is High surface tension adhesion cohesion Due to Caused by
- 4. adhesion cohesion External forces that makes Are internal forces because Water sticks to glass meniscus That’s why graduated cylinders have Water is polar Negative Positive The O side The H side
- 5. Density Mass per unit of volume “Stuff” “Space” Is the Mass is the Volume is the 1.0 g/cm3 Float Sink Less than Greater than Water’s value is
- 6. High heat capacity Heat Ability to hold Boiling and freezing points Causes H2O to have extreme
- 7. 100o C 212o F 0o C 32o F Boiling starts at Freezing starts at
- 8. Heat Sensible Change of state Read by a thermometer Latent Two types are Can be Causes
- 9. Density anomaly Change during phase changes Means the density will Water Yield a full cup of water That’s why Ice floats in A full cup of ice will not
- 10. Density anomaly Change during phase changes Means the density will Water Yield a full cup of water That’s why Ice floats in A full cup of ice will not