CH101 Lec7

CH101 Lec7 - Find the following: 1) hybridization of each...

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Find the following: 1) hybridization of each non-H atom 2) # of σ bonds 3) # of π bonds N N O C O O O -2 C C H H H H C C C C C C H H H H H H 2 σ & 2 π 1 2 σ & 3 π 5 σ & 1 π 3 σ & 1 π sp sp sp 3 sp 2 sp 2 sp 3 sp 2 sp 3 sp 2
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Section 7.0 CHAPTER 7- STATES OF MATTER Three states:    Gas Liquid Solid Molecular Speed Molecular Interaction Shape fast medium slow low medium high of container bottom  own shape of container Condensed phases
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Pressure barometer- measures atmospheric  pressure Height in mm Hg 1 mm Hg = 1 torr manometer-measures  pressure of a gas in  laboratory
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Section 7.1 Converting between pressure units 1 mm Hg = 1 torr 1 atm (atmosphere) = 760 mm Hg = 760 torr 1 atm = 1.01 × 10  Pa (pascal) Ex. 5.67 atm   torr 5.67 atm  ×  760 torr  = 4,309 torr atm Ex. 22.5 mm Hg  atm 22.5 mm Hg  ×      1 atm         = 0.0296 atm   760 mm Hg Ex. 22.5 mm Hg  torr 22.5 mm Hg  ×       1 torr      = 22.5 torr       1 mm Hg atmospheric pressure on earth
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Section 7.1 Thermal Energy The average kinetic energy of the molecules in a  system is the “ thermal energy ”.   speed/kinetic energy number thermal energy  temperature,  thermal energy molecules move faster! 25 o C 50 o C
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ABSOLUTE TEMPERATURE 2 mol 1 mol 0.6 mol Volume (L) Temperature 32 212 ° F- Fahrenheit ° C = water boils at 100 and freezes at 0. 0 100 -100 -200 -273 ° C - Celsius ° F = water boils at 212 and freezes at 32. 273 373 173 73 0 K - Kelvin water boils at 373 K and freezes at 273 K. No negative numbers!  Use in calculations. “absolute zero” Real scientists d o
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Section 7.1 Converting between temperature units K =  ° C + 273.15 Ex. Room Temperature ~25  °  K 25  ° C + 273.15  = 298.15 K Ex. 79 ° F   ° C 5/9(79 ° F - 32) = 5/9(47) = 26  ° C Ex. -10 ° C   ° F 9/5(-10  ° C) + 32 = -18 + 32 = 14 ° F ° F = 9/5( ° C) + 32 ° C = 5/9( ° F - 32)
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Section 7.1 GASES Gases adopt the  shape  and  volume  of a closed container. If the volume of the container is changed,  the volume of the gas changes. Also the  pressure   increases! As volume  , pressure  V and P are  “inversely proportional” Boyle’s Law :   PV = constant  (if n and T are constant) V 1 P
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GASES Section 7.1 When a gas is heated, it expands. The molecules are moving faster and spread out more. As temperature  , volume  T and V are  “directly proportional” Charles’ Law :   V/T = constant  (n and P constant) heat cool
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Section 7.1 GASES Equal volumes of gases measured at the same temperature  and pressure will contain the same number of molecules.
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CH101 Lec7 - Find the following: 1) hybridization of each...

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