Science Single Award - 4SS0 PearsonEdexcel

Alkanes

Gbogbo ọrọ náà

Alkanes are the simplest organic molecules - chains of carbon atoms bonded to nothing but hydrogen. They burn well, which makes them excellent fuels, but they are otherwise remarkably unreactive. Natural gas, petrol, and candle wax are all alkanes.

In this lesson you will learn the general formula for alkanes, why they are called saturated hydrocarbons, and how to draw and name the first five members of the series. You will also explore their combustion reactions and physical property trends.

Ebumnobi

  1. Know the general formula for alkanes
  2. Explain why alkanes are classified as saturated hydrocarbons
  3. Understand how to draw the structural and displayed formulae for alkanes with up to five carbon atoms in the molecule, and to name the unbranched-chain isomers

Akọmọ Ojú-ẹkọ

Light a gas hob and you are burning methane. Fill a car with petrol and you are using octane. Strike a match and the wax tip contains long-chain alkanes. These molecules are everywhere because they are the backbone of fossil fuels and the starting point for much of organic chemistry.

Ọ dị na ngwa Green Bridge

Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.

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Ayẹwo Ẹkọ

Ekele diri gi maka imecha ihe karịrị na Alkanes. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

  1. The general formula for alkanes is: A) CnH2n B) CnH2n+2 C) CnH2n-2 D) CnHn+2 Answer: B
  2. Alkanes are described as saturated because they: A) Contain double bonds B) Dissolve in water C) Contain only single carbon-carbon bonds D) Are very reactive Answer: C
  3. The products of complete combustion of an alkane are: A) Carbon monoxide and water B) Carbon dioxide and water C) Carbon and water D) Carbon dioxide and hydrogen Answer: B
  4. Which alkane has 3 carbon atoms? A) Methane B) Ethane C) Propane D) Butane Answer: C
  5. As alkane chain length increases, the boiling point: A) Decreases B) Stays the same C) Increases D) Fluctuates Answer: C

Ọ dị na ngwa Green Bridge

Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.

Akwụkwọ ndụmọdụ zuru oke nwere eserese
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Mụọ n'ụzọ na-enweghị ịntaneti, oge ọbụla, ebe ọbụla
Ọ dị na Android, Windows, macOS, na Linux

Ọ dị na ngwa Green Bridge

Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.

Akwụkwọ ndụmọdụ zuru oke nwere eserese
Onye inyeaka mmụta AI
Mụọ n'ụzọ na-enweghị ịntaneti, oge ọbụla, ebe ọbụla
Ọ dị na Android, Windows, macOS, na Linux

Meecha Ajụjụ Ule Ọmarịcha

Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Alkanes? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.

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