2 changes in state
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The document discusses the three main ways that the state of matter can change: evaporation, sublimation, and condensation. Evaporation occurs when a liquid turns to a gas above its boiling point, sublimation is when a solid turns directly to a gas, and condensation is when a gas turns to a liquid below its boiling point. It also defines heat of fusion as the energy needed to change from solid to liquid, and heat of vaporization as the energy needed to change from liquid to gas, noting that changing from solid to liquid requires less energy for water.
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2 changes in state
- 2. Changes in State 3 Ways State of Matter Changes -Evaporation -Sublimation -Condensation
- 3. Evaporation When liquid changes to a gas when the temperature is above the boiling point 100 °C, 212°F or 373 K
- 5. Sublimation When a solid changes directly to a gas without going through the liquid state.
- 7. Condensation When a gas changes to a liquid when cooled to or below the boiling point.
- 9. Heat/Energy Joules- measurement of energy (like calories). 4.184 calories= 1 Joule 1000 Joules= 1 kJ (kiloJoule)
- 10. Heat of Fusion Amount of energy needed to change from a solid to a liquid. The heat of fusion for water is 334 kJ/kg.
- 11. Heat of fusion
- 12. Heat of Vaporization Amount of energy needed to change from liquid to a gas. The heat of vaporization of water is 2260 kJ/kg.
- 13. Which requires less energy? Water going from a solid to a liquid. OR Water going from a liquid to a gas.