EAS201 Lecture Notes - Lecture 13: Order And Disorder (Physics), Surface Runoff, Chemical Polarity
22 Mar 2020
School
Department
Course
Professor
Document Summary
Formed by the covalent bonding of hydrogen and oxygen. The molecule has a bent shape (104. 5 angle) Water exists as three phases on earth"s surface liquid, gas (water vapour) and solid (ice) Transitioning between phases results in the absorption or release of energy (energy transfer) Energy is absorbed while going from a more ordered phase to a less ordered phase. Ex. energy is absorbed when moving from ice (more ordered) to water (less ordered) Polar nature allows molecules to form hydrogen bonds with other water molecules. Polarity of water makes it a great solvent for other polar and ionic substances. Crystal lattice structure causes it to have lower density than liquid water (atoms more spread out) Due to the density differences, ice floats in water. Expansion of water as it freezes leads to physical weathering. Everything in the hydrologic cycle is driven by the sun.
