Reaction – Hess’s Law Overview Hess’s Law states that the energy change for a reaction depends on the enthalpy of the reactants and products and is independent of the pathway of the reaction. In this experiment you will use calorimetry to measure the heats of reaction for three reactions: Reaction 1 Reaction Equation NaOH(s) → Na+(aq) + OH-(aq) Solid NaOH is dissolved in water 2 Na+(aq) + OH-(aq) + H+(aq) + Cl-(aq) → Na+(aq) + Cl-(aq) + H2O(l) Solutions of NaOH and HCl are mixed 3 NaOH(s) + H+(aq) +
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Lab 2: Equipotential Lines and Lines Of Force Purpose: The purpose of this lab is to find the electric current when passing through conductors of different shapes and sizes. Also to gain a general knowledge of the laws governing the flow of current through extended conductors is another objective for this experiment. In this lab we are to experiment with the lines of force and equipotentials. We are also to find out vector field and the relationship between the lines of force and the electric field
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Since the Grignard reagent can easily react with water‚ all glassware including the 25 ml round bottom flask‚ magnetic stir bar‚ 3 and 5 ml conical vial‚ 50 mL Erlenmeyer flask‚ claisen adapter‚ drying tube and 5 glass pasteur pipets were first added to a 250mL beaker and placed in the oven for 30 minutes. After the completion of the thirty minutes‚ 0.150 g of shiny magnesium turnings and a stir bar was first added to the round bottom flask and the claisen adapter along with the drying tube packed
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The Role of Law LAW/421 August 6‚ 2012 Michael S. Green The Role of Law Laws are “the body of rules or principles‚ prescribed by authority or established by custom‚ that a state‚ community‚ society‚ or other group recognizes as binding on its members” (Ferguson Publishing‚ 1999‚ p. 105). The purposes of laws are to maintain peace and order‚ to define the rights of citizens‚ to secure justice‚ to harmonize conflicting interests‚ and to provide means for punishing wrongdoers. Laws are applied
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SCIENCE AND ENGINEERING 1. Course Number and Title: CHEM-181 General Chemistry I 2. Semester Hours: 4 Contact Hours: (3 + 2) Lecture Lab 3. Catalog Description This course‚ intended for science majors‚ is the first course of a two-course sequence. Course topics include stoichiometry‚ inorganic nomenclature‚ solutions‚ gas laws‚ thermochemistry‚ atomic structure‚ and chemical bonding. The laboratory work includes basic laboratory techniques and is intended to support lecture
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C.S. Executive Tax Law Dec.09 Solved Ans. 1 Qn. 1. (A) Choose the most appropriate answer from the given options in respect of the following having regard to the provisions of the relevant direct‚ tax laws (i) Income-tax in India is charged at the rate(s) prescribed by — (a) The Finance Act (b) The Income-tax Act (c) The Central Board of Direct Taxes (d) The Ministry of Finance Solution: (a)The Finance Act (ii) Under the Income-tax Act‚ 1961‚ depreciation on machinery is charged on
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The 1950’s were quite radical in fact‚ this is the decade that began rock n’ roll‚ the civil rights movement‚ better family living‚ advances in technology‚ Fashion‚ medical research‚ other wonderful things this country was not used to seeing or hearing. The 1950’s were looked at more as a state of mind or a way of living rather than just another decade or time era in American history. Everything was peaceful now‚ which looking back on the two world wars and the great depression this country was not
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Purpose: To find out the densities and to find out the name of the unknown metals. (Based on the extensive and intensive properties) Check up the words mass‚ volume‚ density‚ extensive properties‚ and intensive properties. Where do the units for mass and volume) come from and what do they mean? What is the density of distilled water? What is Archimedes principle? Does temperature affect the density of a solid? Liquid? Gas? Materials: Safety glasses‚ 10‚ 25 or 50 mL graduated cylinders
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Date: 25th November‚ 2011 Aim: To show that when Hot and Cold water are mixed‚ heat lost by hot water is equal to heat gained by cold water. Theory: This Lab is done to demonstrate “the Law of Conservation of Energy”‚ which implies: - “the heat lost by one (1) substance must be equal to the heat gained by another substance within the system”. Apparatus: Two (2) similar Calorimeters: a Thermometer: a Measuring Cylinder: a Bunsen burner: a Tripod: an Asbestos Gauze Cork Mat. Procedure:
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Introduction The 1930’s‚ known as the Great Depression Era‚ were a time of economic struggles for the American People. The United States Government was faced with multiple issues‚ having an economic depression at home‚ and trying to avoid getting involved with foreign affairs going on in Europe. Although it was a time of difficulty‚ a lot of good came out of this era. Inventions would make life easier‚ and there was a rise in entertainment as the movie industry grew‚ and great novels depicted the
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