time turn it into something useful. Recycling helps to keep Styrofoam out of the waste stream and therefore out of the landfill where it can sit for more than a hundred years. The recycling of polystyrene is not for cost benefits it’s for the benefit of our environment. Background: Styrofoam® is polystyrene‚ but most know it by its brand name: Styrofoam. This plastic material is used for food and drink containers‚ packing materials‚ and other items. Disposable Styrofoam packaging materials‚ take-out
Free Recycling Landfill Waste picker
Reaction between Zinc and Aqueous Copper Sulphate Data Collection and Processing Observations: * Drops of water left on the inside of the measuring cylinder * Hole in the lid‚ possible escape route for gas or splash-back * The polystyrene cup felt warm during the reaction By extrapolating the graph we can estimate what the rise in temperature would have been if the reaction had taken place instantaneously. I can conclude that if the reaction had taken place instantaneously‚ the
Premium Thermodynamics Measurement Energy
McDonald’s: Environmental McNasty? The truth behind its corporate irresponsibility. As the world’s largest franchised corporation‚ with over 31‚000 restaurants in 120 countries employing 1.5 million people‚ McDonald’s is also one of the greatest consumer contributors to the trash epidemic facing our world today. As a corporation that boasts of its environmental responsibility‚ the question is: are they doing all they can. First‚ a few little-known facts: A typical McDonald’s restaurant
Premium Food Nutrition Ethics
analyze the effects of specific liquids on a variety of materials • To observe potential hazards • To investigate the effects of strong bases‚ strong acids‚ acetone and bleach on a variety of materials which include sugar‚ cotton‚ nylon‚ hair‚ polystyrene‚ egg white‚ egg yolk‚ and aluminum foil. 2. Give a summary of your observations for each of the experiments. (24 pts) Sugar + H2SO4 Black clumped substance formed C12H22O11(s) + H2SO4 12C(s) + 11H2O(g) Cotton + HCl No visible change Cotton
Premium Sulfuric acid Egg yolk
depression constant Kf for 1-octadecanol using: Tf = 57.95 oC‚ Hfus = 74.047 kJ mol-1‚ and M = 270.5 g mol-1. ΔTf = Kf m 4. A polymer chemist dissolves 20.00g of polystyrene in 1.000L of benzene. The solution is found to generate an osmotic pressure of 1.000 kPa at 298.0K. Calculate the average molecular weight of the polystyrene. Recall that one Pascal x Meter3 equals one Joule. 5. Ex. 5.22(a) 6. Examine Figure 5.35. Assume the total mass of the mixture is 100g. Also assume l =
Premium Thermodynamics Volume Temperature
poly(ethylene glycol) (PEG) poly(ethylene terephthalate) (PET) polyimide polypropylene (PP ) polystyrene (PS) styrene acrylonitrile (SAN) polyurethane (PU) polyvinylchloride (PVC) SOME COMMONLY USED SYNTHETIC PLASTICS After the First World War‚ improvements in chemical technology led to an explosion in new forms of plastics. Among the earliest examples in the wave of new plastics were "polystyrene" (PS) and "polyvinyl chloride" (PVC)‚ developed by the I.G. Farben company of Germany. POLYVINYL
Premium Polyvinyl chloride Plastic Polymer
Today in modern life‚ humans make use of many objects that have certain devices that they are not even aware of how they work or what their main function is. One of these devices that is used a lot without knowing their existence is what is called a "capacitor." Many people have heard the word capacitor‚ but also many do not even have an idea of what it means or what is the use for it. In this research‚ I will concentrate on explaining the physics of a capacitor and describing the main types of
Premium Capacitor
2. Microfluidics-device testing In this step‚ we use 10 µm polystyrene beads as a cell for testing the trapping ability of the device. The polystyrene beads were mixed with deionized water (DI water) and surfactant (Tween 20) in the ratio of 100: 1: 10 v/v/v. The fast green FCF (C37H34N2O10S3Na2) was added to the mixing solution for increased the particle visualization and then the solution was containing into a 10 ml syringe that connected to the device at an inlet. Before start the experiment
Premium Chemistry Water Oxygen
CHEMISTRY DETERMINATION OF ENTHALPY CHANGE OF NEUTRALIZATION IA Criteria Assessed: DCP CE MS Introduction When an alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions (H+(aq)) from the acid react with the hydroxide ions (OH- (aq)) from alkali‚ forming water. The identity of salt will depend on the nature of the acid and alkali used. H+(aq) + OH- (aq) → H2O(L) The combination of H+ and OH- ions in this way releases energy. In this practical‚ the
Premium Sodium hydroxide Enthalpy
heating than buildings that have no insulation. Two building materials that are being used more and more worldwide‚ are mineral wool and polystyrene. Mineral wool is a good insulator because it holds air still in the matrix of the wool so that heat is not lost. Since air is a poor conductor and a good insulator‚ this helps to keep energy within the building. Polystyrene is also a good insulator and is able to keep cool things cool and hot things hot. It has the added advantage of being resistant to moisture
Premium Electric charge Electricity Heat