Energy changes(download)
... Perform simple energy calculations using different energy units Apply specific heat concept to heat calculations Distinguish between endothermic and exothermic reactions Calculate specific heat from calorimetry Calculate heat changes in calorimetry ...
... Perform simple energy calculations using different energy units Apply specific heat concept to heat calculations Distinguish between endothermic and exothermic reactions Calculate specific heat from calorimetry Calculate heat changes in calorimetry ...
Academic Chemistry Final Exam Review
... 2. What happens during an endothermic reaction? What is the sign of the H value? ...
... 2. What happens during an endothermic reaction? What is the sign of the H value? ...
physical and chemical change
... Matter is anything that has mass and takes up space. The study of matter and how it changes is called chemistry. Matter can be described in terms of two kinds of properties: physical properties and chemical properties. A physical property is a property of a substance that can be observed without cha ...
... Matter is anything that has mass and takes up space. The study of matter and how it changes is called chemistry. Matter can be described in terms of two kinds of properties: physical properties and chemical properties. A physical property is a property of a substance that can be observed without cha ...
physical and chemical change
... Matter is anything that has mass and takes up space. The study of matter and how it changes is called chemistry. Matter can be described in terms of two kinds of properties: physical properties and chemical properties. A physical property is a property of a substance that can be observed without cha ...
... Matter is anything that has mass and takes up space. The study of matter and how it changes is called chemistry. Matter can be described in terms of two kinds of properties: physical properties and chemical properties. A physical property is a property of a substance that can be observed without cha ...
09 Stoichiometry WS Stoichiometry WS
... 10. A car battery produces electrical energy with the following chemical reaction: Pb(s) + PbO2(s) + 2H2SO4(aq) 2PbSO4(s) + 2H2O(l) If the battery loses 340. g of lead in this reaction, how many moles of lead(II) sulfate are produced? 11. In a space shuttle, the CO2 that the crew exhales is removed ...
... 10. A car battery produces electrical energy with the following chemical reaction: Pb(s) + PbO2(s) + 2H2SO4(aq) 2PbSO4(s) + 2H2O(l) If the battery loses 340. g of lead in this reaction, how many moles of lead(II) sulfate are produced? 11. In a space shuttle, the CO2 that the crew exhales is removed ...
Physical and Chemical change: Introduction
... During a chemical change, the particles themselves are changed in some way. In the example of copper (II) chloride that was used earlier, the CuCl2 molecules were split up into their component atoms. The number of particles will change because each CuCl2 molecule breaks down into one copper atom (Cu ...
... During a chemical change, the particles themselves are changed in some way. In the example of copper (II) chloride that was used earlier, the CuCl2 molecules were split up into their component atoms. The number of particles will change because each CuCl2 molecule breaks down into one copper atom (Cu ...
Chemical Equilibrium
... Changing the volume of a reactant container changes the concentration of gaseous reactants and therefore their partial pressures Equilibrium position will therefore move The value of Kc or Kp does NOT change Changing pressure by adding more of an inert gas has no effect of the equilibrium position - ...
... Changing the volume of a reactant container changes the concentration of gaseous reactants and therefore their partial pressures Equilibrium position will therefore move The value of Kc or Kp does NOT change Changing pressure by adding more of an inert gas has no effect of the equilibrium position - ...
Chapter 1
... Stoichiometric factors (or molar ratios) may be used to convert between quantities of reactants and products in a reaction. It is important to realize that the stoichiometric ratios are the ideal proportions in which reactants are needed to form products. A balanced reaction equation often provides ...
... Stoichiometric factors (or molar ratios) may be used to convert between quantities of reactants and products in a reaction. It is important to realize that the stoichiometric ratios are the ideal proportions in which reactants are needed to form products. A balanced reaction equation often provides ...
2007 local exam - American Chemical Society
... 17. A sample of C2H6 gas initially at 50 ˚C and 720 mmHg is heated to 100 ˚C in a container of constant volume. What is the new pressure (in mmHg)? ...
... 17. A sample of C2H6 gas initially at 50 ˚C and 720 mmHg is heated to 100 ˚C in a container of constant volume. What is the new pressure (in mmHg)? ...
Utah - Wavefunction, Inc.
... a. Using data from quantitative analysis, identify evidence that supports the conservation of mass in a chemical reaction. b. Use molar relationships in a balanced chemical reaction to predict the mass of product produced in a simple chemical reaction that goes to completion ...
... a. Using data from quantitative analysis, identify evidence that supports the conservation of mass in a chemical reaction. b. Use molar relationships in a balanced chemical reaction to predict the mass of product produced in a simple chemical reaction that goes to completion ...
Chemical Kinetics - mvhs
... time. Since the rates of reactions vary with time, this rate only gives an average over a period of time. It can be calculated by calculating change in concentration with time. Instantaneous Rate: Rate of reaction at ONE given point of time. It can be calculated from conc.- time graph by finding t ...
... time. Since the rates of reactions vary with time, this rate only gives an average over a period of time. It can be calculated by calculating change in concentration with time. Instantaneous Rate: Rate of reaction at ONE given point of time. It can be calculated from conc.- time graph by finding t ...
E:\My Documents\sch3u\SCH3Ureview.wpd
... a) How many Nitrogen molecules would you have? b) How many Nitrogen atoms would you have? c) Why are these two numbers not the same? 7) What is the percent composition by mass of the compounds: a) H2O b) CO2 c) HCN d) Al2(CO3)3 8) A compound is found to have the following percentage composition by m ...
... a) How many Nitrogen molecules would you have? b) How many Nitrogen atoms would you have? c) Why are these two numbers not the same? 7) What is the percent composition by mass of the compounds: a) H2O b) CO2 c) HCN d) Al2(CO3)3 8) A compound is found to have the following percentage composition by m ...
Chemistry Subject Matter Requirements Part I: Content Domains for
... Chemical Reactions and Chemical Bonding Understand chemical reactions. a. Demonstrate knowledge of different types of chemical reactions, including predicting the products of chemical reactions. b. Interpret potential energy diagrams of reactions (e.g., determining activation energies with and witho ...
... Chemical Reactions and Chemical Bonding Understand chemical reactions. a. Demonstrate knowledge of different types of chemical reactions, including predicting the products of chemical reactions. b. Interpret potential energy diagrams of reactions (e.g., determining activation energies with and witho ...
Class Notes
... chemical change) must be there in the products (after the chemical change) just rearranges somehow. The subscripts in chemical formulas tell the number of atoms of each element involved in the compound. Looking at the chemical equation for the formation of rust (Fe (s) + O2 (g) → Fe2O3 (s)) is the l ...
... chemical change) must be there in the products (after the chemical change) just rearranges somehow. The subscripts in chemical formulas tell the number of atoms of each element involved in the compound. Looking at the chemical equation for the formation of rust (Fe (s) + O2 (g) → Fe2O3 (s)) is the l ...
Chapter 4: Chemical Reaction Dynamics
... 4.4.2 Effect of vibrational and kinetic energy: Polanyi rules For asymmetric reactions, the transition state is usually located closer to either the reactant or the products (early or late barrier). From an inspection of the favourable reaction trajectories, it can be seen that: For an early barrie ...
... 4.4.2 Effect of vibrational and kinetic energy: Polanyi rules For asymmetric reactions, the transition state is usually located closer to either the reactant or the products (early or late barrier). From an inspection of the favourable reaction trajectories, it can be seen that: For an early barrie ...
Classification – 3 main groups
... Evaporation liquid to gas; endothermic Condensation gas to liquid; exothermic Sublimation solid to gas; endothermic Deposition gas to solid ; exothermic Melting solid to liquid; endothermic Freezing liquid to solid; exothermic Kinetic molecular theory-explanation of how particles in matter behave; e ...
... Evaporation liquid to gas; endothermic Condensation gas to liquid; exothermic Sublimation solid to gas; endothermic Deposition gas to solid ; exothermic Melting solid to liquid; endothermic Freezing liquid to solid; exothermic Kinetic molecular theory-explanation of how particles in matter behave; e ...
Transition state theory
Transition state theory (TST) explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated transition state complexes.TST is used primarily to understand qualitatively how chemical reactions take place. TST has been less successful in its original goal of calculating absolute reaction rate constants because the calculation of absolute reaction rates requires precise knowledge of potential energy surfaces, but it has been successful in calculating the standard enthalpy of activation (Δ‡Hɵ), the standard entropy of activation (Δ‡Sɵ), and the standard Gibbs energy of activation (Δ‡Gɵ) for a particular reaction if its rate constant has been experimentally determined. (The ‡ notation refers to the value of interest at the transition state.)This theory was developed simultaneously in 1935 by Henry Eyring, then at Princeton University, and by Meredith Gwynne Evans and Michael Polanyi of the University of Manchester. TST is also referred to as ""activated-complex theory,"" ""absolute-rate theory,"" and ""theory of absolute reaction rates.""Before the development of TST, the Arrhenius rate law was widely used to determine energies for the reaction barrier. The Arrhenius equation derives from empirical observations and ignores any mechanistic considerations, such as whether one or more reactive intermediates are involved in the conversion of a reactant to a product. Therefore, further development was necessary to understand the two parameters associated with this law, the pre-exponential factor (A) and the activation energy (Ea). TST, which led to the Eyring equation, successfully addresses these two issues; however, 46 years elapsed between the publication of the Arrhenius rate law, in 1889, and the Eyring equation derived from TST, in 1935. During that period, many scientists and researchers contributed significantly to the development of the theory.