Exothermic

Chemistry The discovery of gunpowder, or black powder, by the Chinese in the 10th Century revolutionized how wars were fought. Gunpowder is the earliest known chemical explosive composed of approximately 75 percent potassium nitrate (KNO3), commonly known as saltpeter, 15 percent charcoal and 10 percent sulfur. This ratio of 75:15:10 ratio of saltpeter, charcoal and sulfur is commonly known as black powder. Together, the mixture of these three compounds in a proper ratios create a powerful…

and third step, it was observed that the all mixtures contained enzymes other than potato. When liver and H2O2 created into a solution, heat was produced and bubbles formed. Since the test tube has gotten warmer, the reactions took place would be exothermic. Table 2 shows the effect of an enzyme between H2O2 with liver and potato. The result of the liver with H2O2 provided an evidence that an enzyme was present. The fresh liver contained catalase thus it was expected to break down hydrogen…

“‘ Is it a bird!?’ ‘Is it a plane?!’ ‘IT’S SUPERMAN!’ ‘No it really is a plane?’” This famous advertisement was used in news headlines around the United States referring to the terrorist attacks on September 11, 2001. On this day Islamic terrorists hijacked American flights and attempted to attack several US business buildings. American Airlines 11 and United Airlines 175 hit the North and South towers of the World Trade Center, American Airlines 77 took out the Pentagon, and in attempt to go…

Carcinogenic Chemical Product: Fire Retardants Fire safety is a vital part of the modern technological society and as responsible citizens it is important to recognise that, with the aid of fire retardants, there is a prolong time frame of escaping from fires. This widely used carcinogenic product is composed of certain chemical elements within numerous everyday products (either inside the polymeric material or as an external layer) that help combat the ignition through chemical reactions at…

reaction is spontaneous. The Gibbs free energy equation is given by : ∆G = ∆H –T∆S ∆H refers to the enthalpy and is a measure of the actual energy that is released when the reaction occurs. A negative value of ∆H means the reaction is exothermic while a positive ∆H is for an endothermic reaction. ∆S refers to the entropy and it is a measure of the degree of disorder in the product compared to reactants. When a solid with an ordered state reacts with…

(a) (b) (a) (b) 3. 1 Potentiodynamic polarization test of Mg-Zn-RE and Mg-Zn-RE-xCa alloys Potentiodynamic polarization test in Kokubo solution was carried out to evaluate the bio-degradation behavior of Mg-Zn-RE and Mg-Zn-RE-xCa alloys. The results (Fig. 1) revealed that the corrosion potential, Ecorr of Mg-Zn-RE alloy was -1841 mV, which…

Water a vital biological molecule Molecule of water Water is a substance which is transparent, odourless and colourless liquid that has a boiling temperature of 373K, freezing temperature of 273K meaning it is liquid at room temperature. Water is a compound containing 2 hydrogen atoms, but also has an oxygen molecule as well this means it has the molecular formula of H2O. The relative atomic mass of water is around 18 with “11.188% being hydrogen and 88.182% being oxygen” [1]. When bonded it…

Pebble Bed Reactor University of Calgary Fundamentals of Nuclear Energy Najee Elbaroudi James Cody Webber Taylor Donegan Mar 28/16 Abstract One of the most effective ways of converting the natural energy stored in the Earth into usable electricity for everyday life is through the use of nuclear chain reactions created in nuclear reactors. Countries such as China, South Africa and the US have implemented a special kind of reactor to capture the vast amount of energy given off by these…

Trayc Poppenhager May 5, 2015 TA: GK Chem 341 Thermodynamics and Kinetic Control Goal: The overall goal of this experiment was to learn and observe about kinetic and thermodynamic control of different reactions by noticing which product forms faster or slower and possibly which reaction is more stable than the rest of the reactions. Significance: Organic chemists find using kinetic and thermodynamic control useful because they use the concept of the reactions to figure out…

1.1 Problem Summary Ravi raj Chemicals Company manufactures the sulphamic acid. During the process scrubber through SO3 gas liberate the atmosphere. So these SO3 undesirable gases are reducing. The SO3 gas is hazards and it is pollute the atmosphere. In this project we can solve the possible solution then apply to the plant scale. 1.2 Objective Of Projects In these manufacturing process of sulphamic acid first raw material put at the batch…