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kemija > alkani > Flashcards

alkani Flashcards

1
Q

tališča in vrelišča nerazvejanih alkanov

A

naraščajo s številom C-atomov v verigi

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2
Q

gostota nerazvejanih alkanov

A

narašča s št. C-atomov

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3
Q

popolna oksidacija

A

CH4+2O2——>CO2+H2O

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4
Q

nepopolna oksidacija 1. primer

A

2CH4+3O2—–>2CO2+4H2O

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5
Q

nepopolna oksidacija 2. primer

A

CH4+O2——>C+2H2O

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6
Q

radikalska substitucija

A

CH4—Br2—hv–>CH3Br+HBr

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7
Q

krekiranje

A

je reakcija, ki razbije daljše alkane v krajše alkane in alkene

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7
Q

reakcija alkanov s halogeni poteka..

A

pod vplivom ultravijolične svetlobe ali pri povišani temperaturi

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7
Q

reforming

A

je postopek za pridobivanje bencina iz lahkih frakcij, s cepitvijo ravnih verig alkanov in njihovim ponovnim spajanjem v molekule z razvejanimi verigami

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7
Q
  1. elektroliza alkalijske soli ustrezne karboksilne kisline
A

2NaCH3COO—–>2Na+H3C-CH3+2CO2

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7
Q

alkani in izomerija

A

verižna, optična in konformacijska

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7
Q

pridobivanje alkanov v laboratoriju (3)

A
  1. katalitsko hidrogeniranje alkenov
  2. elektroliza alkalijske soli ustrezne karboksilne kisline
  3. suha destilacija zmesi soli karboksilne kisline in baze
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7
Q
  1. katalitsko hidrogeniranje alkenov
A

H2-C=C-H2+H2—Ni/Pb/Pt–300c–>H3C-CH3

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7
Q
  1. suha destilacija zmesi soli karboksilne kisline in baze
A

NaCH3COO+NaOH——>CH4+Na2CO3

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kemija (6 decks)

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