"Vapor pressure and enthalpy lab" Essays and Research Papers

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    Using A Pressure Canner 1. Begin by adding two or three inches of hot water to the canner‚ more if specified in the recipe. Place the filled jars on the canner’s rack‚ making use of a jar lifter. Ensure the jar remains upright at all times‚ and position the lifter so it sits just below the screw band. Fasten the lid on the canner securely. 2. Leave the weight off of the open petcock or vent port‚ as described above. Heat the canner at the highest temperature until the steam begins to flow freely

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    overall purpose of the experiment is to observe the change of pressure as three different gases; N2‚ He‚ and an unknown gas effuses through a pinhole into a vacuum environment. Each gas has a different pattern of changing the pressure depending on its molecular mass‚ which is related to the kinetic theory of gases‚ where heavier gases (N2) effuse slower than lighter gases (He). The experiment setup was prepared‚ measurement of change of pressure as a function of time were recorded. After performing two

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    Blood Pressure Lab Report

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    Introduction: What is Blood Pressure? Blood Pressure can be defined as the force per unit area exerted on a vessel wall by the contained blood in the heart‚ and is measured by millimeters of mercury (mm Hg) (Marieb‚ 703). Each time the heart beats (which is about 60-70 times a minute at rest); it pumps out blood into the arteries. There are two types of pressure recorded that can determine your blood pressure. Your blood pressure is at its highest when the heart beats‚ pumping the blood.

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    Variables Affecting Human Arterial Pressure and Pulse Pressure BIOL 204-506 Remi Ben-Davies Dashaun Lee‚ Amanda Easter‚ and Lynne Baker April 9th‚ 2015 1 Introduction: Purpose: The purpose of this experiment was to determine how different variables may affect arterial pressure and pulse rate. Two subjects were used as models for the tests. The first two tests required the use of sphygmomanometers and stethoscopes to measure the arterial pressure and pulse rate. The last test required sphygmomanometers

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    blood pressure lab report

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    An increase in heart rate and stroke volume An increase in the extraction of O2 from the blood by the muscle An increase in the sympathetic nervous activity that vasoconstricts vascular beds in non-active tissues A decrease in mean arterial pressure An increase in active muscle vascular conductance (flow/MAP) There are no exception Response Feedback: Increases in HR‚ SV‚ active tissue vascular conductance‚ and vasoconstriction in the non-active tissues occurs during the transition from

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    Determining the Enthalpy Change for a Redox Reaction Criteria Assessed: Background Design Research Question What is the enthalpy change between the reaction of Zinc reducing Copper II ions? Purpose Determine the change in enthalpy for the redox reduction of zinc reducing Copper II ions. Independent Variable Dependent Variable The change in temperature Controlled Variables Materials/ Apparatus * Zinc powder * 2‚ Foam cups * 10 cm3 pipette * stopwatch * 1.00 M Copper

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    Chemistry THE GAS LAWS LAB LAB 1 Pressure in kPa Volume in ml Dataset 1 30 90 Dataset 2 35 80 Dataset 3 40 75 Dataset 4 45 70 Dataset 5 50 60 Dataset 6 60 50 LAB 2 New temp. in Celsius New Volume in ml Dataset 1 5 47 Dataset 2 10 48 Dataset 3 15 49 Dataset 4 20 50 Dataset 5 25 51 Dataset 6 30 52 1. Describe the relationship that you observed between pressure and volume in this lab. Refer to your data and/or graph to help support your answer. I observed that the higher the pressure the lower the volume

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    the surrounding. Hence‚ it has a positive value for enthalpy change of reaction. In contrary‚ exothermic reaction is a chemical reaction that releases heat energy to the surroundings‚ resulting in a negative value for enthalpy change of reaction. Enthalpy change of a reaction is the heat energy change in a chemical reaction‚ for the number of moles of reactants shown in the chemical equation. Standard enthalpy of reaction‚ ΔrH⊖ is the enthalpy change that occurs in a system when one mole of matter

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    Simple Vapor Compression Refrigeration System: A simple vapor compression refrigeration system consists of the following equipments: i) Compressor ii) Condenser iii) Expansion valve iv) Evaporator. B COMPRESOR C ∆Q1 200C FLUID TO BE COOLED EVAPORATOR (-300C) w CONDENSER (350C) COOLING WATER 00C ∆Q2 A EXPANSION VALVE D Fig.6.5. Simple vapour compression system The schematic diagram of the arrangement is as shown in Fig.6.5. The low temperature‚ low pressure vapor

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    Capacity for a Calorimeter and of the Enthalpy of an Acid-Base Reaction Abstract The purpose of this lab was to first‚ determine the specific heat capacity of a homemade calorimeter‚ and second‚ to calculate the enthalpy of reaction for an acid-base reaction between 6M KOH and 6M HNO3. To determine the specific heat capacity of the calorimeter‚ two differing temperatures of water were measured and volume was measured and mixed within the calorimeter. The enthalpy of reaction for an acid-base reaction

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