Essays Tagged: "Liquid"
Surface Tension
tension is cohesion and gravity. Surface Tension isthe condition existing at the free surface of a liquid, resembling the properties of anelastic skin under tension. The tension is the result of inte ... dividual surface molecules; this is reflected in theconsiderable curvature at those edges where the liquid is in contact with the wall of avessel. Because of this property, certain insects can stand o ...
Subjects: Science Essays > Physics
Why does water expand when it is frozen?
Water behaves differently than almost all other liquids because it expands when it is frozen. As a liquid is cooled down the molecules move more slo ... ecules in a fixed position (they can still vibrate but not change their relative positions) and the liquid becomes a solid. The molecules in the solid have reached an optimum 'closeness' to each other ...
Subjects: Science Essays
Phase changes of a water molecule.
cup of lemonade you are holding right now. The first amazing phase change will transform us into a liquid. Right now my friends and I are tightly bonded together and cannot move around very much. Can ... the bottom of your empty cup. I guess you liked the lemonade very much! Now going from a solid to a liquid requires heat energy, which will result in melting. Since it is a hot day outside the heat is ...
Subjects: Science Essays > Chemistry
Saturated Solutions.
e unsaturated, saturated, and supersaturated solutions. A solution is when something dissolves in a liquid. Another way of thinking about it is that if you have a liquid and it's not a pure substance, ... olution.The first type of solution is the saturated solution. The saturated solution means that the liquid has dissolved all of the solute that is possible. For example, when someone adds sugar to ice ...
Subjects: Science Essays > Chemistry
Process manufacturing tecnology.
ne. Reaction times with this solvent were extended and it was subsequently replaced by an excess of Liquid A.The dissolution of Solid A in Liquid A and the subsequent reaction both appear to be endoth ... endothermic. Gaseous waste products from the reaction can be a problem if not controlled or abated. Liquid A loss may also be significant. Neither of the reactions will proceed satisfactorily at room ...
Subjects: Science Essays > Engineering > Manufacturing Engineering
Phases of matter and vapor pressure.
o we describe phase changes?What are the phases of matter?The four phases of matter include:oSolidsoLiquidsoGasesoPlasmasA phase change involves a change in the physical state of a substance from one ... change in the physical state of a substance from one phase to another such as: or vice versaoSolid- liquidoLiquid- gasoSolid - gasSolidsThe physical state of matter characterized by particles that app ...
Subjects: Science Essays > Chemistry
Different Aspects Of Science
object that can be observed without changing it.Matter exists in four phases. It exists in solids, liquids, gases, and plasmas. You can determine whether an object is a solid or not based on two char ... t keeps a solid a definite shape. Little motion can occur in the particle arrangement. Particles in liquids, however, can move more freely. The particles are close together but are not as tightly pack ...
Subjects: Science Essays
The Water Cycle
ver waterfalls. Eventually the water flows into the ocean. During evaporation, the water turns from liquid into gas, and moves from oceans and lakes into the atmosphere where it forms clouds. Then the ... metal spoon. First, I filled the mug with the freshly boiled water and held a metal spoon above the liquid. Water droplets formed on the spoon, they get larger and finally drop back into the liquid. I ...
Subjects: Social Science Essays > Education
What is Sublimation
he solid phase directly to the vapour phase, or vice versa, without passing through an intermediate liquid phase.2. Sublimation is the process of a solid changing form a gas to a solid without going t ... emperature but some are very low to go directly to a solid so for an easier process they got to the liquid state by going to a higher temperature , so that then it can be frozen and then begin to subl ...
Subjects: Science Essays
A Thing To Remember
In this experiment, I tested for surface tension in liquids and I think I obtained very accurate results. My results are accurate because I tested each ... for the second experiment, it was correct. It was correct because the dishwashing soap did make the liquid able to hold less weight, about four dimes less. I did not have any problems, except spilling ... on the floor, everything went as planned. What could have been a problem would have been if I used liquids with different densities. The liquids that were denser would definitely hold more weight. ...
Subjects: Social Science Essays > Psychology
The Density Of An Unknown Liquid
Density Of An Unknown Liquid Density Of An Unknown Liquid Lab (#100) Purpose : The labs purpose is to determine the densit ... f An Unknown Liquid Lab (#100) Purpose : The labs purpose is to determine the density of an unknown liquid, which later on will hopefully help in the discovery of the liquid's identity.Hypothesis: I t ... will hopefully help in the discovery of the liquid's identity.Hypothesis: I think that the unknown liquid number 100 is "Glycerol". My hypothesis is based on that the substance has a very oily textur ...
Subjects: Science Essays > Chemistry
Massing Grown Crystals
by the water alone. Having the mass and volume, I can find the density.Solids are much denser than liquids and gases. Closely packed molecules of solids gives them a definite shape and volume. The mo ... at the glass to a certain degree so that it is so pliable, that they can shape it into objects.In a liquid, molecules are held only loosely together, allowing it to flow in all directions.When a solid ...
Subjects: Science Essays > Chemistry
Can we determine the densities of different materils?
different densities. In our lab our main aim is to determine the densities of different solids and liquids.Materials and equipment:A brass cylinderA copper cylinderAn iron cylinderA hydrometerRuler ( ... ola oilWaterBalance (scales)CalculatorCylindersObservations:We found mass by putting our metals and liquids onto the balance. When we found out the mass we moved onto the volume, this time is was a tw ...
Subjects: Science Essays > Chemistry
Massing Grown Crystals
by the water alone. Having the mass and volume, I can find the density.Solids are much denser than liquids and gases. Closely packed molecules of solids gives them a definite shape and volume. The mo ... at the glass to a certain degree so that it is so pliable, that they can shape it into objects.In a liquid, molecules are held only loosely together, allowing it to flow in all directions.When a solid ...
Subjects: Science Essays > Chemistry
Importance of Chemical Analysis in day to day life
phy:Column chromatography uses a wide range of adsorbent solids, including alumina and silica gels. Liquids may also be adsorbed on these solids and in turn serve as adsorbents—a process called p ... chemists to construct columns with very different properties for particular tasks. High performance liquid chromatography, a variant of this technique that is now in common use, employs liquids adsorb ...
Subjects: Science Essays > Chemistry
Seperating cyclohexane and toluene by distillation understanding perceptual sets
Seperating cyclohexane and toluene by distillationAim: Separate two miscible liquids, either by macroscale or microscale process, using simple and fractional distillation. Compa ... l distillation.Introduction:The purpose of this experiment is to learn how to separate two miscible liquids by microscale process. There will be use of simple and fractional distillation. Simple and f ... ies, or to separate two or more volatile compounds with adequate difference in boiling points` When liquid is placed in container, some of the molecules evaporate into unoccupied space inside the cont ...
Subjects: Science Essays > Chemistry
Sedimentation
SedimentationAbstractSedimentation is the process of separating a liquid mixture of suspended particles into clear supernatant liquid and denser slurry having a highe ... designed. The batch sedimentation experiment was accomplished by measuring the height of the clear liquid interface at two-minute intervals using initial concentrations of 25, 50, and 75 grams per li ... h receive the suspension or dilute slurry at the center or side, permit the overflow of supernatant liquid, and produce sludge from the bottom of the tank.Sedimentation essentially proceeds according ...
Subjects: Science Essays > Engineering > Chemical Engineering
Chemistry Study Notes - Equilibrium
H2O(l) H2O (g)1. When you first pour the water in the flask, there's not much water vapor above the liquid. Over time, molecules will evaporate and enter the space above the liquid.2. All the liquid w ... ove the liquid.2. All the liquid will NOT evaporate. There is not enough space in the air above the liquid to accommodate all of those water molecules. Eventually the space above the liquid will becom ...
Subjects: Science Essays > Chemistry
GEGE E
Liquid DensityTuan Tran, 9/1/14, KIPP San Jose CollegiatePurpose:The purpose of the lab is to be abl ... p the 10 mL and 250 mL beaker on the table. First member go up to the front get a pipet and get the liquid. Second, measure the mass of pipet then measure again with no liquid within the pipet and sub ... ass of pipet then measure again with no liquid within the pipet and subtract from original. Put the liquid into the 10 mL graduated cylinder and measure the volume. After getting the information calcu ...
Subjects: Area & Country Studies Essays > Travel Descriptions