How can i make a model on "types of mixtures"?
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Could you try the old idea of different types of liquid in a clear glass/plastic tube. Each has a different density, so the heaviest goes to the bottom, the lightest to the top? Cant remember the exact liquids to use, but something dense like oil, then baby oil, water, etc.....the tube can be shaken, but the liquids will always seperate out in layers......
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This sounds like homework, so I'll give you the ideas but not the data.\n\nThe enthalpy of the mixture at standard conditions is the sum of standard heats of formation of the components of the mix. It will be given in kJ/mol (Ar is 0 kJ/mol being an element, the other two you can look up in tables or on internet). \n\nThen you need to adjust for the sensible energy difference compared to standard conditions : you will also need to look up the specific heat of each component (usually expressed in kJ / mol ºK) and multiply the specific heat of each component by the amount and by the difference in temperature. Make sure you have everything in the same units.\n\nRemember if you are working in moles its easier because to a first approximation, one mole of any gas occupies the same volume (if you undrestand how to allow for deviations from the ideal gas laws, you wouldn't be asking this question) and I assume that the percentages are volume percent, not by weight\n\nEnjoy
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A substance has its own unique set of properties which are different from other substances.  A mixture is a combination of different substances that keep their own properties when mixed.  Mixtures do not have their own unique set of properties.
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How about making yourself a model, finding its point group then working out the reducible representation?
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Here you are (nice circles and atoms and stuff):\n\nhttp://www.uwgb.edu/dutchs/PETROLGY/ScaleAtomsCsRn.HTM
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http://www.bbc.co.uk/schools/gcsebitesize/chemistry/classifyingmaterials/formulae_and_equationsrev4.shtml
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A liquid mixture of two or more substances that retains the same composition in the vapour state as in the liquid state when distilled or evaporated under some conditions
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square-ish in shape\ncome in different sizes\nmany varieties
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Substances in a mixture just need to be separated, which might happen naturally over time, or could be done by filtration, distillation or a centrifuge (which spins fast to take heavier items out of the mixture).  \n\nElements in a compound are chemically bonded, so you have to reverse the bonding process, which is different depending on the elements in the compound.  If it is a salt, it is as simple as adding water and using electricity to pull the ions you want out.  Once you do, those ions are not all going to be elements--further manipulation will be needed.  Other chemicals are much more complicated though.
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Go to www.allrecipies.com.  They are really helpful.
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blueb_24' s answer to the first part of you question is great. \n\nMechanical mixtures are very simple mixtures that can be separated mechanically (soap is definitely not one). Some mechanical mixtures found in everyday life: \n- M&M's (various colours)\n- Mixed vegies\n- Bag of marbles\n- Box of bolts and nuts\n\nSolutions are more complex and can only be seperated by means of their physical properties, such as boiling point. Some everyday solutions include:\n- Coffee\n- Detergent\n- Salt water\n- Vinager\n\n4.a  Solid solutions: \n- Sand - suspension mixture of solid particles\n- Muddy water - solid particles suspended in water\n- Smoke - solid mixed in gas\n\nb) a liquid solution that does not contain water:\n- Motor oil - a mixture of heavy hydrocarbons\n- Vegetable oil - mixture of plant oils\n\nc) a solution of gases\n- Air - air is a mixture of many gases\n- LP gas (liquid petroleum gas)- mixture containing mainly propane or butane (depending on application)
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Here's a hint: mixtures can always be broken down into other things.  \n1. Sea water is a mixture because it has a ton of different things in it, like salt and water and various microorganisms.  \n2. Cooking oil is a mixture.  It is a blend of various kinds of oils.  \n3. Coal is a pure substance.  It is made up of nothing but carbon atoms, pure to the atomic level. \n4. Steel is a mixture.  It is an alloy of different other metals, especially iron.  It also uses carbon.  \n5. Chili sauce has all sorts of ingredients.  I don't know what they are exactly, but there has to be stuff like different peppers and condiment bases.  It's definitely a mixture.  \n6. Bronze is a mixture.  It's another metal alloy made with tin, copper, and some other metals.  \n7. Sand is a mixture.  I live by the beach, and you can see variations in the grains' colors. They're not all the same, so it's a mixture of different kinds of sand. \n8. Gold is an element.  At 24 k, it's as pure as you need to be for practical purposes.  Pure substance.  \n9. Orange squash: well, it's all orange squash, but squash has the stem, the skin, the flesh, and all these different parts. The components themselves range from DNA to proteins to sugars and carbohydrates and other organic molecules.  Mixture.  \n10. Salt is pure.  Just NaCl, baby.  \n11. Milk has fats and proteins and carbs and water and vitamins.  Mixture. \n10. Oxygen is just oxygen, an element.  Pure substance. \n12. Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapor, noble gases, and hydrogen.\n13. "Oranger" juice: same as milk, for the most part.  Mixture.  \n14. Coke: caffeine, carbonic acid, sugars... mixture\n15. Soil has all sorts of stuff in it. Mixture.
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Theories of Solutions : Excess functions (and consequently activity coefficients)\ncan be obtained from equations of state. However, this approach has limited\npractical applicability.\n· Lattice Models :\nLiquid is considered to be a quasicrystalline state with molecules arranged in a\nregular array. Mixing two different liquid to obtain a solution results in the\nentropy of mixing (as lattice structure is altered) and enthalpy of mixing (due to\nintermolecular forces). The potential energy of the system is obtained by pairwise\naddition of all molecular pairs considering only the nearest neighbors. An\nexpression for Helmholtz energy can be derived in terms of the interchange\nenergy (w) which arises when a molecule of one component in the lattice is\nreplaced by the molecule of the second component. The interchange energy is\ndependent upon the difference in the potential energies of pairs 1-2, 1-1 and 2-2\n(for a binary mixture of 1 and 2). For a regular solution the excess Gibbs energy is\nequal to excess Helmholtz energy, leading to a method for calculation of activity\ncoefficients. The interchange energy can be calculated from potential functions\nand molecular properties, primarily for mixtures of nonpolar molecules similar in\nsize. This approach is not very useful for mixtures having additional complexities.\n· Non-random Mixtures:\nA solution is essentially non-random in nature as in most cases intermolecular\nforces for different compounds are not identical. So in a binary mixture of 1 and\n2, molecules of 1 either prefer 2 or 1 as immediate neighbors. The solution has\ncertain order to it resulting in sE < 0. A quasichemical theory for such solutions\ncan be developed by writing an equilibrium constant expression for the formation\nof complex 1–2 from molecules of 1 and 2. The equilibrium constant is related to\nthe interchange energy w, leading to expressions for excess Helmholtz energy,\nexcess entropy and excess Gibbs energy.\n· Two-Liquid Theory:\nSince the solutions are essentially non-random, they can be thought of as\ncomprised of 2 (or more) hypothetical fluids depending upon the nature of\ninteraction between the solution components. The thermodynamic properties of\nthe solution are then mole fraction weighted averages of the properties of the\nhypothetical fluids. Area fractions and volume fractions can be defined for each\nhypothetical fluid, and expressions developed for the excess properties of the\nsolution. The UNIQUAC equation, developed on the basis of two- liquid theory is\nquite successful, however, it may over-correct for non-randomness of the\nsolution.\n· Group Contribution Methods\nActivity coefficients can be calculated for various mixtures by considering\nindividual molecules to be comprised of different functional groups. The number\nof distinct functional groups (methyl, methylene, hydroxyl, etc.) is relatively\nsmall compared to the number of distinct compounds. The interaction between\nvarious compounds is obtained by contributions of the functional group\ninteraction for the compounds. ASOG (analytical solution of groups) and\nUNIFAC (universal functional activity coefficient) are two group contribution\nmethods that are quite useful. Group contribution methods are very rapid,\nhowever, they may not necessarily be accurate. The results of the group\ncontribution methods need to be compared with experimental data for validation.\n· Chemical Theory of Non- ideality of Liquid Solutions:\nThe non- ideality of the solutions is due to formation of new species by the\nreactions of the components. These reactions may be associations of a single\ncomponent (dimmer, trimer, polymer formation) or solvation (interactions of two\nor more components, e.g. complexation). These species are at chemical\nequilibrium with each other and form ideal solutions. Therefore, the behavior of\nthe solution can be described if the “true” composition of the solution is\ndetermined. If z1 and z2 are
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A pure substance would be 100% one type of atom/element, such as gold (Au).  A mixture, is a combination of two or more types of atoms/elements.
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Try using ModelPress Publisher\nIt can be downloaded from\nhttp://www.modelpress.com/
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If when you mix the two together the solution turns clear, you have a solution.  If it makes a cloudy mixture, or if there is visible solid on the bottom, you have a heterogeneous mixture, or a non-uniform mixture, which is not a solution.
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Several individual products having unique properties reacting together to give a new end product which may have different properties