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CHem ch 12 gases summary sheet

CHem ch 12 gases summary sheet - Rachael Johnston Ch12...

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Rachael Johnston Ch12 GASES : Gas Characteristics . 1 : , , O2 Colorless odorless tasteless . a - boils @ 183 C * ( dissolve in water that s why fish can ) live in it . b , by itself it does NOT bur but supports combustion of other things 4 Examples to generate Oxygen . 1 Decompose H 2 * 0 2H 2 0 2 H 2 + O O 2 . 2 Add H 2 O to Na 2 O 2 * 2H 2 + 0 2Na 2 O 2 + 4NaOH O 2 . 3 Heat KClO 3 * 2KClO 3 + 2KCl 3O 2 . 4 Electrolysis of H 2 ( ) * 0 most common H 2 O 2H 2 + O 2 . 2 O 3 OZONE . , , , , a blue explosive unstable poisonous has an odor . b produced by electrical discharge of lightening ( - ) endothermic reaction huge number . c protects us from UV exposure . 3 H 2 . , , a colorless odorless tasteless . b most abundant element in the universe . , c by itself explodes but does NOT SUPPORT combustion of other substances . ( - ) ( - ) d Deuterium H 2 and Tritium H 3 are isotopes 4 Ways to Make Hydrogen . * + 1 from acid replacement Zn H 2 SO 4 ZnSO 4 + H 2 . * + 2 From water displacement 2Na 2H 2 O + 2NaOH H 2 . ( .) * 3 From hydrocarbons organic chem CH 4 + H 2 O + CO H 2 * + or C H 2 O + CO H 2 . * 4 Electrolysis of Water 2H 2 O 2H 2 + O 2 . 4 N 2 . ( ) a fairly unreactive prevent spoilage . : = b has triple bond N why it s stable . % c most air nitrogen 78 . 5 CO . & a unites with Hemoglobin blocks transportation of O 2 . b produced if carbon fuels are incompletely burned * 2CH 4 + 3O 2 + 2CO 4H 2 O . 6 CO 2 . a traps reflected energy and warms up the earth
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( ) greenhouse effect . b breath in CO 2 turns into H 2
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