Hess’s Law and the Molar Enthalpy of Combustion for Magnesium Purpose: The purpose of the lab ultimately is to find the molar enthalpy of magnesium. This is done by finding the enthalpy changes of reactions (2) and (3). The enthalpy changes of reactions (2) and (3) along with the enthalpy change given for reaction (4) can be used to arrive at a value of the molar enthalpy of combustion of magnesium by using Hess’s Law. Hypothesis: By using Hess’s law to calculate the molar enthalpy of combustion
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PHYS113 Lab1: Coulomb’s Law ABSTRACT Performing this experimentation will allow one to investigate the relationship quantitative relationship between the electrostatic force and the distance between charged objects. First a simply observation was made of the electrical forces on two pieces of tape taking note of their attraction and repulsion. This same phenomenon was observed in the experimentation of two charged spheres. Furthermore the we used this experimentation to determine the
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References: Anne B. Padías‚ Making the Connections: A How-To Guide for Organic Chemistry Lab Techniques. 2nd edition. (Distillation (pp. 141 – 154) Chromatography‚ general (pp. 162 – 163) Gas Chromatography (pp. 179 – 187)) Answers to Questions 1. Simple distillation is used when the boiling points of two different substances are very different
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Design Lab Experiment: How would an increase in the atomic radii of the metals in period 4 affect the time it takes for a metal to react with HCl. Hypothesis: If Hydrochloric Acid is dropped on all of the metals in period 4‚ then the elements with the largest atomic radii will react faster with Hydrochloric Acid because atoms with bigger atomic radii are
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contrasting the three types of cancer you have statistics on. a. Once you are done reviewing the information‚ click to return to the biology laboratory navigation screen. MICROSCOPES 5. Click on the microscope sitting on the right side of the lab bench on the biology laboratory navigation screen a. Click a picture on the Table of Contents (at the top of the screen) to get information about one of the five cell phases. Use the forward and back pointers to move between cards. Click the up arrow
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2/28/2013 Introduction: Hess ’s law is a terminology in chemistry named after Germain Hess‚ a Swiss-born Russian chemist and physician who published it in 1840. The law states that the total enthalpy change during the complete course of a reaction is the same whether the reaction is made in one step or in several steps. Enthalpy cannot be directly measured‚ but rather the change in enthalpy. Enthalpy is described as the change in kinetic and thermal energy. Hess’s law states that the enthalpy change
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Morcilla‚ Ma Dame Ametrini T. MT11213 Chem 24 Prof. Zenaida Bacsafra COLLAGEN Collagen is a protein found abundantly throughout the bodies of animals‚ including humans. It is a very variable protein‚ forming the basis of many connective and support tissues. It is a fibrous structural protein‚ with a distinctive structure. In fact‚ collagen makes up about one-third of the total body weight. Its name is derived from the French word for glue. Collagen fibers‚ which resemble microscopic
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Taha Al-Yousif Hooke’s Law Lab Date conducted: September 18th 2013 Partners: Mohammed‚ Liam‚ Ben Nguyen Purpose: The purpose of this experiment is to find the relationship between the stretch of the spring and the attached mass and to verify that this relationship is accurately described by Hook’s Law. Theory: Hooke’s Law states that to extend a spring by an amount (Stretch) from its previous position‚ one needs to add an external force (Mass). Therefore
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Abstract In the asymmetric synthesis of (S)-Ibuprofen‚ the compound is synthesized in nonracemic form directly from an achiral precursor. First‚ racemic ibuprofen was converted to aN achiral ketene via the acid chloride by adding thionyl chloride followed by triethylamine. Then‚ ketene was reacted with a chiral and nonracemic (S)-ethyl lactate produces a mixture of diasteromeric esters of ibuprofen derivatives where (S) configuration is predominantly. Finally‚ hydrolysis of the ester then provides
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Virtual Lab: Classifying Using Biotechnology Worksheet NOTE: As you read the information in the Microbiology Handbook‚ there may be some terms you are not familiar with – such as 16s ribosomal RNA and Polymerase Chain Reaction. Refer to your text to read background material explaining any terms or processes with which you are not familiar. Record the results of your investigations of each unknown in Table 1 by completing the following steps: 1) Apply the stain to your first
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