Plan: Aim: The enthalpy change of combustion of a fuel is a measure of the energy transferred when one mole of fuel burns completely. A value for the enthalpy change can be obtained by using the burning fuel to heat water and using fact that 4.2j of energy are required to raise the temperature of 1g of water by 1oC. In this investigation my aim is to find the enthalpy change of combustion of a number of alcohols so that I can investigate how and why the enthalpy change is affected by the molecular
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Problem Does temperature affect the resistivity of different sized copper wires? Hypothesis I think that the resistivity will increase with higher temperatures because with higher temperature‚ resistivity is higher due to the fact the atomic lattice structure increases. Background Electrical resistivity is the measurement of how a material opposes the flow of an electrical current. On the other hand‚ electrical conductivity () is the inverse of resistivity. It is the measurement
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Chemistry Internal Assessment 2011 Candy Au Introduction The reaction between zinc and copper (II) sulphate is endothermic. If an excess of zinc powder is added to a measured amount of aqueous copper (II) sulphate in a calorimeter and the temperature change is recorded over a period of time‚ the enthalpy change of the reaction can be experimentally determined. Assumption 1. Mass of H2O in 100cm3 of CuSO4 solution is 100g 2. Specific heat of solution is 4.18 kJ kg-1 K-1 which is the
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of the news of savages causing trouble everywhere Jamie received a copper flute as a gift from overseas Jamie sees a spiral of smoke coming from the hills Jamie finds his pet seal shot Chapter 4 Jamie clamours over rocks to find Robert because he was out with Andrew hunting Jamie sees a snow goose and follows it into the woods Jamie meets a native boy by a creek Jamie gives the boy his copper flute; the boy gives Jamie his copper necklace and a salmon Chapter 5 Jamie returns to town and finds everyone
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calculate the enthalpy change of neutralization of the given pairs of acid and base. Theory: When 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 the alkali‚ forming water. Ionic equation: H+ (aq)+OH- (aq) → H2O (l) The identity of the salt will depend on the nature of the acid and alkali used. The combination of H+ and OH- ions in this way releases energy. In this practical‚ the enthalpy changes accompanying
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I believe that Copper Sun should be taught to future generations because it is an inspirational and informational novel. This novel instructs us about a dark time in our history‚ and how if we want it not to repeat itself‚ we should advice future generations to prevent that from happening again. Copper Sun is an exceptional good read. The book teaches us multiple lessons about how you should always persevere through the difficult times just like the two main characters in the book‚ Polly and Amari
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Analysis: Copper Lab 1) Calculate the mass of the copper that was recovered 2) Use the formula shown below to calculate the “percent of recovery” of copper for your experiment. 3) Use the proper symbol and formula to write balanced equation for each of the five copper reactions‚ include state symbols. 4) Classify each of the five copper reactions. (Refer to the above order‚ please!) A) Single Displacement B) Double Displacement C) Decomposition D) Double displacement E) Single Displacement
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Copper in Silver Nitrate Lab: Making Silver Sabrina Kate S. Carranza – Chemistry Hour 6 I. Purpose: The purpose of this experiment is to distinguish the relationships between reactants and products‚ in addition to expanding on concepts such as single displacement reactions‚ mole ratio values‚ moles to mass‚ theoretical yields‚ limiting reactants‚ excess‚ stoichiometric relationships and percentage errors. II. Hypothesis: /3 -If the copper metal is submerged in the silver nitrate solution
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Formula for Grade Average Calculation There are 3 grade averages: TGA‚ CGA and GGA. TGA (Term Grade Average) is the combined grade average covering all courses taken in the term and the session immediately following. CGA (Cumulative Grade Average) is computed based on all the courses taken by the student which are expected at the time of calculation to be applied towards the degree requirements in the current program. TGA & CGA = Sum of (Course Credits x Course grade points) Sum of Course Credits
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‘’Copper sun by Sharon M Draper is a literary masterpiece that depicts the horrors of salary is told through the eyes of amari‚ a fifteen year old african from the Ewe tribe‚Amairi and her family lived in a village of ziavi‚untroubled‚and kind village but one day unexpected visitors described an strange milk faced men turned the village into a living nightmare with the help of the Ewe people trusted all the ashanti‚manny was slaughtered including the village chief‚amiri parents and siblings‚and most
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