1 / 10

Properties of Water

Properties of Water. Chapter 3. Overview of H 2 0’s properties. Resulting from hydrogen bonding: Cohesion/Adhesion/Surface tension High specific heat (temperature moderation) Density is lower as a solid than as a liquid Universal solvent Neutral pH. Cohesion/surface tension. Cohesion:

lora
Download Presentation

Properties of Water

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Properties of Water Chapter 3

  2. Overview of H20’s properties • Resulting from hydrogen bonding: • Cohesion/Adhesion/Surface tension • High specific heat (temperature moderation) • Density is lower as a solid than as a liquid • Universal solvent • Neutral pH

  3. Cohesion/surface tension • Cohesion: • Water molecules are attracted together due to weak hydrogen bonding. • Surface tension: • how difficult it is to stretch or break a surface

  4. Adhesion/Relevance • Adhesion: • Water molecules are attracted to to other materials due to weak hydrogen bonding. • Relevance: • Poured/make waterfalls/waves, etc. (Cohesion) • No energy is required for water to move up the stem of a plant (cohesion & adhesion)

  5. Specific Heat • the amount of heat energy required to bring 1 g of substance up 1 °C. • Water sets the standard. • Water’s = 1.

  6. Specific Heat of Water • Water’s specific heat is 1 • Water heats & cools slowly because of its high specific heat • due to hydrogen bonding • it’s cooler by the Lake. freeze boil

  7. http://phet.colorado.edu/en/simulation/states-of-matter

  8. Density • Liquid water’s density=1.00 g/cm3 • Ice’s density is 0.92 g/cm3 • As water freezes, it becomes more dense, until it reaches the highest density at 4 degrees. • Then, it crystallizes & expands from 4-0 degrees, so it floats.

  9. Universal solvent • Most substances dissolve in water. • Esp. ionic and polar molecules • Nonpolar substances (like oil) do not dissolve in water. • Solute + Solvent = Solution http://phet.colorado.edu/en/simulation/sugar-and-salt-solutions

  10. Water is neutral • Water has a pH of 7. • Living things survive best in pH near 7 http://phet.colorado.edu/en/simulation/ph-scale

More Related