Chemistry Internal Assessment: Determining the Enthalpy Change of a Displacement Reaction AIM: To determine the enthalpy change for the reaction between copper(II) sulfate and zinc. BACKGROUND THEORY: Bond breaking is endothermic while bond forming is exothermic. The reaction between copper(ll) sulfate and zinc is exothermic as the energy required to form the bonds of the products is greater than the energy required to break the bonds of the reactants. In an exothermic reaction‚ heat is
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Adoption has many effects on families; identity formation is one the most important stages that a child has to form during the ages of adolescence. It is a lifelong process but it is mainly formed between the ages of 13 to 18. Forming an identity can be very difficult for an adopted child because leaving all the struggles that they will be already facing‚ the formation of identity will add another conflict in their lives. Parents can help adopted children by establishing a sense of identity and by
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FORMATION OF BLOOD CLOTS Definition • A blood clot is a mass of blood cells and blood components that form to stop the bleeding that occurs when a blood vessel is injured. When a blood vessel is broken‚ platelets in the blood become sticky and clump together at the site of the injury. They begin to form a mass to stop the flow of blood. Description • Clotting is the body’s normal response to a bleeding injury. It is a necessary function to prevent a person from losing too much blood
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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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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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SC4: Explain the formation of stereotypes and their effect on behaviour. Stereotypes are often referred to as mental representations (e.g. personalities‚ attitudes‚ behaviour) or forms of “social categorization‚” which are carried on to categories of individuals. This occurs when individuals encounters experiences with certain individuals of a group‚ and those experiences are correlated to all the members where that individual belongs‚ known as the “Illusory correlation.” Taking account of this
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quantity of magnesium metal to form chloride product. We then mass the final product and subtract to find the mass of chlorine in the product. Once we know the masses of elements in the compounds‚ we can convert to moles and determine the simplest whole number mole ratio. Objective The objective of this lab is to determine the empirical formula of magnesium chloride. Methodology 1. Measure the mass of an evaporating dish with its watch glass lid. 2. Obtain a strip of magnesium metal approximately
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million years ago‚ this region formed. The process of the formation of mountains is called an orogeny. Rocky Mountain ranges‚ such as the Bighorn Mountains and Uinta Mountains were formed by the Laramide Orogeny. Devil Tower stands 867 feet from base to summit‚ and above sea level its elevation is 5‚112 feet and around 1‚267 feet above the north-flowing Belle Fourche River. Sedimentary‚ igneous‚ and erosional processes led to the formation of Devils Tower National Monument. First‚ sedimentary rocks
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I am going to investigate the enthalpy change of combustion for the alcohol homologous series. I will investigate how alcohols with increasing number of carbons affect the enthalpy change when an alcohol goes under combustion. The energy that alcohols release when being used is called the enthalpy change of combustion. This is defined as "Standard enthalpy change of combustion‚ is the enthalpy change when one mole of a substance burns completely in oxygen under standard conditions (298K‚ 100 KPa
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plants. In photosynthesis‚ plants absorb carbon dioxide gas from the air‚ with energy from the sun‚ water from the soil and chlorophyll to make carbohydrates for food. Figure 13.1 – The Reaction of A wire of magnesium with Oxygen (page 342) of the textbook also shows how a wire of magnesium metal and oxygen in the
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