First, complete the online homework.
Then, post an answer to the following 6 mark question in the comments section (remember to put your name on your post).
You may use notes/books/revision guides/the internet to help you.
Molecules X and Y are both hydrocarbons. X has
the formula C3H8 and Y has the formula C100H202.
DESCRIBE how you would expect their physical
properties to differ and EXPLAIN why they are
so different.
The hydrocarbons physical properties would be different because molecule Y would be harder than X, this is because there are more particles in it meaning the hydrocarbon would have stronger bonds and a higher melting point.
ReplyDeletethey are made of the same elements, the molecular structure makes them different. i think molecule Y to be heavier than X as it has a different molecule structure.i would expect it to be stronger and more dense yyet it may be more brittle due to the amount of atoms. the reason that they are different is the amount of molecules and the ratio of carbions to hydrogen.
ReplyDeleteMolecules X and Y are both hydrocarbons, however, Y has much higher amounts of the properties meaning it would be much denser than X and have a much higher melting point too. X is in the form of a gas whereas Y is a solid. THe properties used in both X and Y are exactly the same but the amount of each is different this means that Y would have much longer chain of molecules as there are so much more molecules in it than in X.
ReplyDeleteAlthough both X and Y are hydrocarbons and therefor contain exactly the same products the amount of each product is different which therefore means the over all result is different. X is a lot less dense than Y and is therefore a gas while Y is very dense and is a solid. Y has a much higher melting point than X as the chain of molecules it contains is so much higher meaning there is a lot more to have to melt.
ReplyDeleteThe physical properties of decacontane (C100H202) and propane (C3H8)differ. They are both hydrocarbons yet they house different properties.
ReplyDeletePropane is a gas. in it's natural form. it is also very reactive when exposed to high enough temperatures and oxygen.
Decacontane is a much heavier hydrocarbon due to the fact that it has more neutrons and protons than a molecule of propane. it is also likely to be less reactive ((if i remember rightly from lesson)
Hydrocarbons are molecules that are made up of chains of carbon and hydrogen atoms only. I would expect molecule X to be a shorter chain of atoms, as it only has 3 Carbon molecules and 8 Hydrogen molecules. This would cause its boiling point to be lower than molecule Y’s because there would be less matter to heat up. Molecule Y is a longer chain molecule, as it has 100 Carbon molecules and 202 Hydrogen’s. This would make its boiling point fairly higher than molecule X. Y would also be a stronger molecule because intermolecular forces are greater in larger molecules than they are with smaller molecules like X. This would enable them to be used for different materials such as plastic and fuels. I think these molecules are so different because of the different lengths of the chains. Molecule Y will have a larger surface area, as there are more molecules making it up, than molecule X, causing them to behave differently.
ReplyDeleteBecca
molecule x would be much smaller than molecule y because it is made up of a lot less atoms therefore molecule x would react differently to other substances than molecule y because whilst they are made up of the same types of atoms they are made up of a different number of atoms changing their surface area and therefore their reactions with other things will vairy.
ReplyDeleteKatie McFarlane.
ReplyDeleteMonocules X&Y would be different in their physical properties because of the lengths of the 2 hydrocarbon chains. Monocule X's formula would be a gas because its a short-chain hydrocarbon monocule with a low boiling point. It would be a gas a room temperature like propane. Monocule Y is a long chain hydrocarbon with a high boiling point and is liquid with a viscous consistancy at room temperature like crude oil.
Molecules X and Y are different as they have different amounts of Carbon and Hydrogen atoms. Y has the formula C100H202, which means it has a longer chain than X which is C3H8. By having different length chains, it means they have different surface areas, which means they have different properties and are better for uses the other may not be. It may be one is more durable than the other, or one is more flexible. Laura Nellis.
ReplyDeleteIan Kelly: Because molecule X has only 3 carbon elements and 8 hydrogen elements, it will be relatively small in size, whereas the Y molecule has 100 carbon elements and 202 hydrogen elements. This will differ the size, melting point and type of usage within a laboratory. They are both very different because of the way they are both structured, for example, because molecule Y has a lot more carbon than molecule X, it will have a much larger mass and appearance due to what it is formed of.
ReplyDeleteThe physical differences in the two hydrocarbons is quite a few things. The first difference we can see, judging from the formulas, is that one is much bigger than the other one.The first one has a much smaller formula with smaller numbers indicating that the molecules are a lot smaller. The longer molecules, using the theory of long and short hair, will get alot more tangled with eachother than the smaller ones will. This then results in another physical difference, density.
ReplyDeleteDavid Treen
The X will have different properties to the Y hydrocarbon because X is a smaller hydrocarbon the Y hydrocarbon would be heavier and stronger because its bigger but the X will be weaker because it is smaller and they are completely different there for they will have different properties.
ReplyDeleteMolecule X is known as Propane, a flammable Gas found in Petroleum (A Hydrocarbon). It is a very light gas due to the High Prescience of Hydrogen, which along with the carbon, is the likely reason for it being flammable. Molecule Y is known as Decacontane, composed of Hydrogen and Carbon similar to Propane, but in much higher density. This denseness means it is likely to be a Liquid or Solid rather than a Gas. Decacontane has a longer Molecular chain than Propane, meaning it will take more Energy to break it apart (i.e: It will take longer to burn). As Propane has a shorter Molecular chain, it will take a shorter time to burn.
ReplyDeleteJames Clark- levle 5, good use of key terms but some of the information is not valid to the question
ReplyDeleteEmily and Luke
Elizabeth seal- goood use of words but some more information would be good as some of it was unclear to read level 3
ReplyDeleteEmily and Luke
Ashley Vincent
ReplyDeleteGood description and very informative. Make sure to mention intermolecular forces, and explain in more detail why their properties differ.
Luke Moore
Good description. Make sure to mention intermolecular forces and explain why.