1. Ozone (O3) in the atmosphere can react with nitric oxide (NO): O3(g) + NO(g) ( NO2(g) + O2(g)‚ with (H( = -199 kJ/mol‚ (S( = -4.1 J/K·mol. Calculate the (G( for this reaction at 25(C. A. 1020 kJ/mol B. -1.22 ( 103 kJ/mol C. 2.00 ( 103 kJ/mol D. -1.42 ( 103 kJ/mol E. -198 kJ/mol 2. For the reaction H2(g) + S(s) ( H2S(g)‚ (H( = -20.2 kJ/mol and (S( = +43.1 J/K·mol. Which of these statements is true? A. The reaction is only spontaneous
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Introduction What is chemical change? Chemical change is the alteration of a substance into one or more different substances with different properties (also called chemical reaction). The four different types of chemial reations are synthesis‚ decomposition‚ single displacement‚ and double displacement. Synthesis is when atoms and/or molecules combine to form larger molecules. Decomposition is when a large molecules are split into elements or smaller molecules. Single Displacement has an element
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Stephany Matos Chem Lab: Chemical Equilibrium Lab 52 Synopsis Iron (III) ions react with thiocyanate ions (SCN-) to form iron (III) thiocyanate‚ FeSCN2+. It is represented in the equation below: Fe3+ (aq) + SCN- (aq) FeSCN2+ (aq) Therefor the equilibrium constant for this reaction is: KC = [FeSCN2+]/([Fe3+]•[SCN-] For this experiment we were able to determine the equilibrium constant KC for this reaction. First we prepared five different mixtures with known initial concentrations of
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Evaporating dish Spatula Watch Glass Filter paper Tripod Mortar and pestle Alcohol Lamp Funnel Beaker Data: Naphthalene 1. white crystalline compound 2. has a strong odor 3. round shape 4. it weighs .23g (2 pcs.) Observation: 1. After grinding the two pieces of naphthalene balls‚ we put it in the evaporating dish with water and stirred it and placed it in the tripod and heat it. The funnel with filter paper served as the lid of the evaporating dish. 2. The
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Materials & Methods: This aim of this experiment was to determine whether or not a chemical reaction occurred after the mixing of various chemicals. The evolution of a gas‚ the formation of precipitation‚ and the change of temperature or color are all indicative of a chemical reaction. It was assumed that a reaction did not take place if the mixture of chemicals exhibited none of these characteristics. Several precipitation‚ complex-ion formation‚ redox‚ and acid-base reactions were performed.
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Chemical Reactions Lab Synthesis Reactions: Synthesis reactions occur when two elements or compounds combine to create one single compound. The general equation of synthesis reactions is: A+B→AB. The following are the complete balanced equations for the five synthesis reactions performed in the lab. Reaction 1: Reaction 2: Reaction 3: Reaction 4: Reaction 5: The reaction of CO2 and water is a prime example of a synthesis reaction. This is a synthesis reaction because it follows the general
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This experiment was performed to demonstrate a cycle of chemical reactions involving copper. This lab will start with copper as a reactant in the first reaction through a series of five chemical forms of aqueous phase reactions and ending to calculate the percentage of recovered solid copper as a product in the last reaction of the experiment. The experiment resulted in a percent recovery from the cycle of copper reactions of an increase to 139%. . Introduction: The purpose of this experiment is
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Report Submitted: February 17‚ 2013 Title: Physical and Chemical Properties Purpose: To investigate and learn the physical and chemical properties of pure chemical substances. Procedure: I used various different tools to investigate the different physical and chemical properties‚ such as blue and red litmus papers‚ beakers‚ and wells. Data Tables: Substance Name Color Odor Heat Effect Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Silver None None None Not soluble‚ small bubbles Red
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The primary goal of my behavior change project was to break my bad habit of skipping meals. Unfortunately‚ when I younger‚ I had an eating disorder‚ and a lot of the unhealthy habits that I picked up during that time have stuck with me. I have asked myself countless times if my eating disorder would ever go away completely‚ but I realized that it is in my hands to break the habits that keep me close to that period. This project was helpful to me because it made me really think about what my health
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Observation Report The person observed for this report. She has been observed during two separate negotiations and this is a report on the observations made during them. This report will also provide interpretations on what has been observed. Observervation 1(Pub Brewery‚ Buyer) Body language Observee has her arms crossed and resting on the table. Her upper-body is leaning in slightly and she is making eye contact with the other party on a regular basis. She smiles on occasion and uses hand gestures
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