GCSE 21st Century Chemistry C1 C2 C3

Anyone else got any ideas about the 6 markers?

My problem with 1 2 3 is the questions sometimes are too simple and I miss the basic science and instead explain the stuff I've done in 4 5 6 and end up with a few less marks because of it.

I do better with the 123 modules haha such a loser here!

Do we need to know the products made from exact hydrocarbon chain lengths (pg 21 in revision guide)?

Nothing bad about it, in fact I end up doing worse on the 123's than the rest of the units

Hi,

Would this be a correct explanation for the separation of crude oil?

Crude oil is a mixture of hydrocarbons. Crude oil has to be refined in order for it to be useful. Crude oil enters the fractional distillation column where molecules are separated into different fractions based on the size of their molecules and boiling point. The temperature is higher at the bottom and lower at the top. The hydrocarbons such as bitumen and lubricating oil have a high boiling point due to having large molecules (in terms of size), this means that the intermolecular forces of attraction are stronger so more energy is need to overcome the forces in order to separate the hydrocarbon chains, thereby giving them a higher boiling point. On the other hand the molecules that have lower boiling points have smaller sized molecules, so their intermolecular force of attraction are weaker and so less energy is needed to break the intermolecular forces to cause the hydrocarbon chains to uncoil and slide past each other.

Hi,

Would this be a correct explanation for the separation of crude oil?

Crude oil is a mixture of hydrocarbons. Crude oil has to be refined in order for it to be useful. Crude oil enters the fractional distillation column where molecules are separated into different fractions based on the size of their molecules and boiling point. The temperature is higher at the bottom and lower at the top. The hydrocarbons such as bitumen and lubricating oil have a high boiling point due to having large molecules (in terms of size), this means that the intermolecular forces of attraction are stronger so more energy is need to overcome the forces in order to separate the hydrocarbon chains, thereby giving them a higher boiling point. On the other hand the molecules that have lower boiling points have smaller sized molecules, so their intermolecular force of attraction are weaker and so less energy is needed to break the intermolecular forces to cause the hydrocarbon chains to uncoil and slide past each other.

We have to go to school until the 8th, then we come in only for our exams and lessons of those exams.

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Just wondering, how many of you guys are on study leave?
Our school makes us have to come

Hi,

Would this be a correct explanation for the separation of crude oil?

Crude oil is a mixture of hydrocarbons. Crude oil has to be refined in order for it to be useful. Crude oil enters the fractional distillation column where molecules are separated into different fractions based on the size of their molecules and boiling point. The temperature is higher at the bottom and lower at the top. The hydrocarbons such as bitumen and lubricating oil have a high boiling point due to having large molecules (in terms of size), this means that the intermolecular forces of attraction are stronger so more energy is need to overcome the forces in order to separate the hydrocarbon chains, thereby giving them a higher boiling point. On the other hand the molecules that have lower boiling points have smaller sized molecules, so their intermolecular force of attraction are weaker and so less energy is needed to break the intermolecular forces to cause the hydrocarbon chains to uncoil and slide past each other.

My school is running booster sessions up until half term. Most people are allowed to choose if they come in or not. After half term, I think we just have to come in for exams.