Skip to main content
Indietro

1.1

I pulsanti di controllo sono stati cambiati in modalità "navigazione".
1/31

Termini in questo insieme (31)

  • polar covalent bonds

    overall charge is unevenely distributed

  • hydrogen bonds

    bond between positive and negative ends of 2 or mroe polar molecules

  • cohesion

    when molecules resisit seperation from one another

  • surface tesnion

    measure of how difficult it is to stretch or breakt he surface of aloiquid.

    • cohesion brings this

  • what does cohesion bring out in water

    surface tension

  • how does water have high surface tension

    because the hydrogen bonds

  • adhesion

    when 2 molecules stick together

  • what is temperature

    the average kinetic energy.

    • increase speed = increase kinetic of molecules

    • molecules move faster as they abosrb increase heat

  • molecules move _____ as they absorb(taking in thermal energy from surroundings) increased heat

    faster

  • molecules move _______ as they use heat(converting or using it )

    slower

  • Thermal energy gets passed from ______ to _____ object

    warmer to cooler object until tmeperature of the warmer object is = cooler object; aka this transfer called heat

  • specific heat

    amount of heat that must be absorbed first to change (1 g of the substance) its temp by 1 degree Celsius.

  • water has ____ specific heat

    high

  • water has ____ heat of vaporization

    high

  • why does water have high heat of vaporization

    when changing from liquid to gaseous states water's hydrogen bonds must break before molecules exit liquid states

    and waters hydrogen bonds have a lot of strength together. so it is harder to break them apart.

  • what is heat of vaporization

    amount of heat a liquid must absorb for 1 gram of it to be converted from liquid to gas

  • density

    how jammed in cells are/how close things are to one another

  • how does ice in water react and why or better question is why does ice float in water

    ice in water is not as dense

    because water gets stuck. this is because as temperatures become colder, water s molecules become very slow to the point where they can't break hydrogen bonds causing the molecules becoming locked and creating space.

  • hydrophillic

    "loving water"

    • polar

  • hydrophobic

    waterphobic

    • nonpolar

  • polar molecules will most liekly react how in water

    it will most likely love water, and thus dissolves in water

  • hydrogen ion

    h +

  • hydroxide ion

    \(Oh^{-}\)

  • how are hydroxide and hydrogen ions created

    when hydrogen bonds shift and leave electron behind

  • Pure water chemical property

    equal amount of h+ and oh-

  • Acids

    substance that increase H+ of a solution

  • Base

    reduces H+ concentration

  • PH scale

    measure of Hydrogen ion (H+) concentraiton

    • ranges from 0-14

  • what ph value is neutral

    7

  • buffers

    a substance that minimizes changes in concentrations of h+ and oh- in solutions

    • charity case (takes and gives depending on situation)

    • helpful for biological flyids where they can maintain a constant ph despite additon of other stuff

  • Ocean acidification

    co2 + ---> co2 dissolves in sea water --> forms carbonic acid ---> PH of ocean -

    • alters balance of condition for life & coral reefs