that some of the heat released or absorbed in the reaction will be absorbed by the calorimeter itself. This amount must be determined experimentally and is referred to as the heat capacity of the calorimeter. This means the amount of heat required to raise the temperature 1 kelvin. The heat capacity of the calorimeter can be determined by using the following equation: ΔH =− ΔT (heat capacity of calorimeter + heat capacity of contents) Procedure: A. Heat Capacity of Calorimeter Construct a calorimeter by nesting two Styrofoam cups together
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non-integer 2 Base Quantities Name Length Time Mass Electric current Thermodynamic Temperature Amount of substance Luminous intensity Symbol for quantity l t m I T n IV Symbol for dimension L T M I Θ N J SI base unit meter second kilogram ampere kelvin mole candela 3 SI Base Units: Second: The second (s) is the duration of 9‚192‚631‚770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom. Meter: The meter (m)
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molecules start moving slower and if all energy is removed from the molecules then the system that the molecules exist in will have zero energy. When matter has zero kinetic energy means that the matter has a temperature of absolute zero‚ or zero kelvin. It is impossible for anything to be colder then absolute zero because molecules cannot have negative speed or velocity. To make an assessment of the kinetic energy of a system is to find the average kinetic energy of a
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Reference Guide & Formula Sheet for Physics #20 Page 1 of 8 Components of a Vector if V = 34 m/sec ∠48° then Vi = 34 m/sec•(cos 48°); and VJ = 34 m/sec•(sin 48°) #4 Weight = m•g g = 9.81m/sec² near the surface of the Earth = 9.795 m/sec² in Fort Worth‚ TX Density = mass / volume #21 Heating a Solid‚ Liquid or Gas Q = m•c•∆T (no phase changes!) Q = the heat added c = specific heat. ∆T = temperature change‚ K Linear Momentum momentum = p = m•v = mass • velocity momentum is conserved
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something. Ex1-A quantity is length; a unit used to measure length is a meter. Ex2- A quantity is mass; kilograms are used to measure mass. 6. List the seven SI base units and the quantities they represent. Meter(length)‚ Kilogram(mass)‚ Seconds(time)‚ Kelvin(temperature)‚ Mole(amt. of substance)‚ Ampere(electric current)‚ Candela(Luminous intensity.) 8. Identify the SI unit that would be most appropriate for expressing the length of the following. a. width of a gymnasium- meter b. length of a finger-centimeter
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"We have controlled machines and uncontrolled men‚" declares a slogan depicting the potential threat of global disaster due to the misuse of technology. It catches the tragic irony of modern society. The last century has seen amazing advances in science and technology‚ by which‚ "the world is at your finger-tips"‚ as some ads put it. Yet statistics expose the twentieth century as the most violent century in known human history. The bookEnding Violent Conflict by Michael Renner states that three times
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Colligative Properties & Osmotic Pressure Peter Jeschofnig‚ Ph.D. Version 42-0149-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate student’s writing of lab reports by
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6.1.1 If the reaction produces heat (increases the temperature of the surroundings) then it’s exothermic. If it decreases the temp (i.e. absorbs heat) then it’s endothermic. Also‚ the yield of an equilibrium reaction which is exothermic will be increased if it occurs at low temps‚ and so for endothermic reactions at high temperatures. 6.1.2 Exothermic : A reaction which produces heat. Endothermic : A reaction which absorbs heat. Enthalpy of reaction : The change in internal energy (H) through
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Milk: Physico-Chemical Properties Booklet No. 277 Dairy Management & Milk Products: DMMPS - 7 Contents Preface I. Introduction II. Physical Properties 1. Taste and odour 2. Colour 3. Specific gravity 4. Boiling point 5. Freezing point 6. Refractive index 7. Electrical conductivity 8. Specific gravity 9. Co-efficient of thermal expansion 10. Thermal conductivity 11. Viscosity 12. Surface
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Chemistry 101 Chapter 6 THERMOCHEMISTRY · Thermochemistry is the study of the quantity of heat energy released or absorbed in a chemical reaction. Example: the burning of fuel: is a heatevolving reaction · Heat : · Energy: is a form of energy the potential to do work (to move matter) exists in many different forms: Electrical energy Kinetic Energy (energy of motion) Light energy Heat energy Chemical energy (energy of substances) · Different forms of energy can be interconverted
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