Endothermic reactions - PowerPoint PPT Presentation
Chemistry 112
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Forensic Aspects of Fire Investigation
Forensic Aspects of Fire Investigation. Objectives: Define oxidation. Define energy and give examples of its different forms. Describe the role of heat energy in chemical reactions. Define heat of combustion and ignition temperature.
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Thermochemistry
Thermochemistry. Energy. Energy – the ability to do _________ or produce _________ Exists in 2 forms: Kinetic energy – energy of _________ Potential energy – energy at _________ or energy of _________ . Energy. Kinetic energy – in a chemical reaction _________ is the determining factor
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RATES OF REACTION
RATES OF REACTION. Rates of Reaction. The rate of a chemical reaction is the speed at which the reaction occurs (i.e. speed at which the reactants are used or products are produced). Rate can be measured by the: 1) change in mass of reactants or products . 2) change in pH
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General Chemistry
General Chemistry. 1 st Semester Review. Chapter 2. Qualitative observation : describes matter without using numbers Ex: Quantitative observation : describes matter using measurements Ex:. Classifying Matter by Composition.
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Chemical Engineering and Sustainability . By Me. What is Chemical Engineering. The branch of engineering concerned with the design and operation of industrial plants – Google The activity of applying chemistry to the solutions of practical problems – Princeton
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Section 2-4 & 2-5 “Chemical Reactions & Enzymes ”
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Chemical Reactions
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Reactions and Corrosion
3.3 – pg. 99-100. Reactions and Corrosion. Think back to last class: Do you remember the rotting apple? What changes occur as the apple rots? Chemical Change: Ethene gas is produced as the apple rots Physical Change: Apple juices evaporate (a change of state) .
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Changes in matter
Changes in matter. Physical and Chemical Properties Physical and Chemical Changes Observable Features of Chemical Reactions. Physical properties. used to identify substances used to classify substances used to determine effective building materials. Examples of physical properties.
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Chemical Reactions
Chemical Reactions. Chapter 14 Material on Midterm. A model formula. Chemicals react in very precise ways. In this activity, you will model a chemical reaction and will predict how chemicals react. Section 1: Forming New Substances. Objectives:
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Energy Changes
Section D3.3. Energy Changes. Bond Energy. Energy associated with bonds Exothermic reactions: Energy is released Produces an increase in temperature May produce light Reactants Products and Energy. Endothermic Reaction. A reaction in which energy is absorbed
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Chapter 7:. Chemical Reactions. 7.1: Chemical reactions alter arrangements of atoms. Atoms interact in chemical reactions: Chemical reaction: produces new substances by changing the way in which atoms are arranged. Bonds between atoms are broken New bonds are formed.
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Chemical Reactions
Chemical Reactions. Energy and Reaction Rates. Chemical Reactions. Chemical reactions require energy to start Activation E nergy - Energy needed to start a chemical reaction Endothermic reactions take in energy Exothermic reactions give off energy. Chemical Reactions. Chemical Reactions.
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Finding a balance (between reactants & products). Chemical equilibrium. Has been reached when the concentration of reactants and products are constant Dynamic equilibrium : The rate of formation of reactants = the rate of formation of products.
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Reaction Energy and Reaction Kinetics
Reaction Energy and Reaction Kinetics. Driving Force of Reactions. Objectives. Explain the relationship between enthalpy change and the tendency of a reaction to occur. Explain the relationship between entropy and the tendency of a reaction to occur.
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7.3 Exothermic and Endothermic Reactions. Review Stuff from 7.1. Chemical reactions involve the breaking of chemical bonds in the reactants and the formation of chemical bonds in the products . Reactants are on the left side Products are on the right side. Law? What law?.
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Enthalpy. Calorimetry of Chemistry. Enthalpy. During a chemical reactions bonds are broken and/or made . When this occurs we can gain or lose chemical potential energy.
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