Thermo notes Part II
... Ex. 6) Find the ∆Grxn for liquid ethanol, C2H5OH, undergoing combustion: • C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g) • Is this reaction spontaneous or nonspontaneous? ...
... Ex. 6) Find the ∆Grxn for liquid ethanol, C2H5OH, undergoing combustion: • C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g) • Is this reaction spontaneous or nonspontaneous? ...
Data: I am writing out the question and underlining it.
... reason, and intellect has intended us to forgo their use.” - Galileo Galilei (astronomer and physicist) • Remember, I am working hard for you. I expect that you will work hard for me. • I find it offense when at the end of the term you are begging me to round or expecting me ...
... reason, and intellect has intended us to forgo their use.” - Galileo Galilei (astronomer and physicist) • Remember, I am working hard for you. I expect that you will work hard for me. • I find it offense when at the end of the term you are begging me to round or expecting me ...
chapter 1 - Revsworld
... Which of the following statements is/are correct? I. When heat energy flows from a system to the surroundings, we know that the temperature of the system is greater than that of the surroundings. II. Given the thermochemical equation 4NH3(g) + 5O2(g) ------> 4 NO(g) + 6H2O(g) H = -906 kJ, the therm ...
... Which of the following statements is/are correct? I. When heat energy flows from a system to the surroundings, we know that the temperature of the system is greater than that of the surroundings. II. Given the thermochemical equation 4NH3(g) + 5O2(g) ------> 4 NO(g) + 6H2O(g) H = -906 kJ, the therm ...
Explained answers - Admissions Testing Service
... To answer this question correctly you need to understand that the process is carried out in order to make more insulin (protein). In order to make more protein, you need to use DNA/genes. Therefore A and B are incorrect since you need to start with DNA/genes. A is also incorrect since the end produc ...
... To answer this question correctly you need to understand that the process is carried out in order to make more insulin (protein). In order to make more protein, you need to use DNA/genes. Therefore A and B are incorrect since you need to start with DNA/genes. A is also incorrect since the end produc ...
NAME UNIT 7: NOTES: REDOX (PART 1): OXIDATION #`S, An
... of O2 is 0, since the molecule is produced by species of the same (not different) element(s)] ...
... of O2 is 0, since the molecule is produced by species of the same (not different) element(s)] ...
Fundamentals of Theoretical Organic Chemistry Lecture 1
... Intramolecular Interactions Interactions between molecules are important for several reasons. One example is the interaction between the solvent and solute as shown in Figure 1.1.2—4. Such interactions play a key role for certain reactions, which occur in a given polar solvent, but do not take place ...
... Intramolecular Interactions Interactions between molecules are important for several reasons. One example is the interaction between the solvent and solute as shown in Figure 1.1.2—4. Such interactions play a key role for certain reactions, which occur in a given polar solvent, but do not take place ...
-Atomic Bonding in Solids
... Ionic bonding is perhaps the easiest to describe and visualize. It is always found in compounds that are composed of both metallic and nonmetallic elements. Atoms of a metallic element easily give up their valence electrons to the nonmetallic atoms. In the process all the atoms acquire stable or ine ...
... Ionic bonding is perhaps the easiest to describe and visualize. It is always found in compounds that are composed of both metallic and nonmetallic elements. Atoms of a metallic element easily give up their valence electrons to the nonmetallic atoms. In the process all the atoms acquire stable or ine ...
2014_S4_CHM_NORMAL (ALL)
... 53. Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound. Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X2Y. 54. Consider the following information: ...
... 53. Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound. Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X2Y. 54. Consider the following information: ...
CHEM 1405 Practice Exam #2
... A) Solid sodium carbonate is heated to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to sodium oxide and carbon dioxide. C) Sodium carbonate decomposes to sodium oxide and carbon dioxide gas. D) Sodium carbonate is heated to give sodium oxide and carbon dioxide. 20) ...
... A) Solid sodium carbonate is heated to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to sodium oxide and carbon dioxide. C) Sodium carbonate decomposes to sodium oxide and carbon dioxide gas. D) Sodium carbonate is heated to give sodium oxide and carbon dioxide. 20) ...
Final Study Guide (Semester 2) Answer Key
... CuSO4(aq) + 2KOH(aq) Cu(OH)2(s ) + K2SO4(aq) Which compounds above are strong electrolytes? CuSO4 , KOH , K2SO4 a. Which chemical above is not soluble in water? Cu(OH)2 c. Which chemical above is the precipitate? Cu(OH)2 2. Solutions of Barium nitrate and potassium sulfate are mixed. ***The first ...
... CuSO4(aq) + 2KOH(aq) Cu(OH)2(s ) + K2SO4(aq) Which compounds above are strong electrolytes? CuSO4 , KOH , K2SO4 a. Which chemical above is not soluble in water? Cu(OH)2 c. Which chemical above is the precipitate? Cu(OH)2 2. Solutions of Barium nitrate and potassium sulfate are mixed. ***The first ...
Mineralization of Drugs in Aqueous Medium by Advanced Oxidation
... above electrolytic system by adding small amounts of a catalyst like Fe2+, which reacts with electrogenerated H2O2 to yield •OH in solution from Fenton’s reaction (1). The most popular electro-Fenton method is the so-called electrogenerated Fenton’s reagent (EFR) [34,37-39], where O2 is bubbled thro ...
... above electrolytic system by adding small amounts of a catalyst like Fe2+, which reacts with electrogenerated H2O2 to yield •OH in solution from Fenton’s reaction (1). The most popular electro-Fenton method is the so-called electrogenerated Fenton’s reagent (EFR) [34,37-39], where O2 is bubbled thro ...
Test 8 Review
... difference between the energy change (ΔH) and the product of the absolute or Kelvin temperature (T) and the entropy change (ΔS). Reaction rates. The speed of chemical reactions depends on several factors: [1] Nature of reactants. Chemical reactions occur by breaking and rearranging existing bonds. T ...
... difference between the energy change (ΔH) and the product of the absolute or Kelvin temperature (T) and the entropy change (ΔS). Reaction rates. The speed of chemical reactions depends on several factors: [1] Nature of reactants. Chemical reactions occur by breaking and rearranging existing bonds. T ...
“Midterm” Exam # 1 - Elgin Community College
... (a) Pb2+(aq) + Br−(aq) + KNO3(s) (b) Br2(aq) + NO2(g) + PbK2(s) (c) PbO(s) + K+(aq) + Br−(aq) + NO2(g) (d) PbBr2(s) + K+(aq) + NO3−(aq) ...
... (a) Pb2+(aq) + Br−(aq) + KNO3(s) (b) Br2(aq) + NO2(g) + PbK2(s) (c) PbO(s) + K+(aq) + Br−(aq) + NO2(g) (d) PbBr2(s) + K+(aq) + NO3−(aq) ...
Test 2 Guide Key
... 2) In the reaction: CH4 + 2 O2 CO2 + 2 H2O, methane is an oxidizing agent. False. It is the reducing agent. (it is the one oxidized) 3) In the reaction: Hg2Cl2 Hg + HgCl2, mercury is both oxidized and reduced. True. Check the oxidation numbers to see that Hg goes from +1 to both 0 and +2. 4) KMn ...
... 2) In the reaction: CH4 + 2 O2 CO2 + 2 H2O, methane is an oxidizing agent. False. It is the reducing agent. (it is the one oxidized) 3) In the reaction: Hg2Cl2 Hg + HgCl2, mercury is both oxidized and reduced. True. Check the oxidation numbers to see that Hg goes from +1 to both 0 and +2. 4) KMn ...
Dr. Baxley`s Equilibrium Worksheet
... 2 NH3 (g) ⇌ N2 (g) + 3 H2 (g) At 450.˚C, Kc = 6.30. An unknown quantity of NH3 is placed in a reaction flask (with no N2 or H2) and is allowed to come to equilibrium at 450. °C. The equilibrium concentration of H2 is then determined to be 0.342 M. Determine the initial concentration of NH3 placed in ...
... 2 NH3 (g) ⇌ N2 (g) + 3 H2 (g) At 450.˚C, Kc = 6.30. An unknown quantity of NH3 is placed in a reaction flask (with no N2 or H2) and is allowed to come to equilibrium at 450. °C. The equilibrium concentration of H2 is then determined to be 0.342 M. Determine the initial concentration of NH3 placed in ...
2010
... A beaker contained 75.0cm of aqueous copper (II) sulphate at 23.7 C. when scrap iron metal was added to the solution, the temperature rose to 29.30C. a) Write an ionic equation for the reaction that took place. (1 mark) b) Given that the mass of copper deposited was 5.83g, calculate the molar enthal ...
... A beaker contained 75.0cm of aqueous copper (II) sulphate at 23.7 C. when scrap iron metal was added to the solution, the temperature rose to 29.30C. a) Write an ionic equation for the reaction that took place. (1 mark) b) Given that the mass of copper deposited was 5.83g, calculate the molar enthal ...
Subject Area Assessment Guides
... bonded atoms. In metals valence electrons are not localized to individual atoms but are free to move to temporarily occupy vacant orbitals on adjacent metal atoms. For this reason metals conduct electricity well. When an electron from an atom with low electronegativity (e.g., a metal) is removed by ...
... bonded atoms. In metals valence electrons are not localized to individual atoms but are free to move to temporarily occupy vacant orbitals on adjacent metal atoms. For this reason metals conduct electricity well. When an electron from an atom with low electronegativity (e.g., a metal) is removed by ...
Introduction to Organic Synthesis
... Retrosynthetic analysis is the process of working backwards from the target molecule to progressively simpler molecules by means of DISCONNECTIONS and/or FUNCTIONAL GROUP INTERCONVERSIONS that correspond to known reactions. When you've got to a simple enough starting material (like something you can ...
... Retrosynthetic analysis is the process of working backwards from the target molecule to progressively simpler molecules by means of DISCONNECTIONS and/or FUNCTIONAL GROUP INTERCONVERSIONS that correspond to known reactions. When you've got to a simple enough starting material (like something you can ...
Skill Practice 1
... 2. For which substance, A or B, does the freezing point decrease as the pressure is increased? 3. One of the substances behaves more like most other substances. Which substance and what property allows you to tell? 4. Assuming that the temperature scales for both phase diagrams are the same, which c ...
... 2. For which substance, A or B, does the freezing point decrease as the pressure is increased? 3. One of the substances behaves more like most other substances. Which substance and what property allows you to tell? 4. Assuming that the temperature scales for both phase diagrams are the same, which c ...
Chemistry in Society Homework Booklet
... where [A] represents the concentration of A, etc and a represents the number of moles of A,etc. (i) Write down the expression for the equilibrium constant for the following equilibrium. 2NH3(g) N2(g) + 3H2(g) (ii) What will happen to the position of the equilibrium if the reaction is carried out ove ...
... where [A] represents the concentration of A, etc and a represents the number of moles of A,etc. (i) Write down the expression for the equilibrium constant for the following equilibrium. 2NH3(g) N2(g) + 3H2(g) (ii) What will happen to the position of the equilibrium if the reaction is carried out ove ...
Loeblein chemistry clicker questions2013
... how the potential energy of the system changes. • Describe what affects the potential energy of the particles and how that relates to the energy graph. • Describe how the reaction coordinate can be used to predict whether a reaction will proceed slowly, quickly or not at all. • Use the potential ene ...
... how the potential energy of the system changes. • Describe what affects the potential energy of the particles and how that relates to the energy graph. • Describe how the reaction coordinate can be used to predict whether a reaction will proceed slowly, quickly or not at all. • Use the potential ene ...
Chapter 3 – Stoichiometry of Formulas and Equations This chapter
... This chapter addresses two basic concepts: 1) the masses of molecules and salts at both the atomic and macroscopic levels and 2) the number relationship between reacting species. 3.1 The Mole You were introduced briefly to the atomic mass unit in the previous chapter as a convenient way of discussin ...
... This chapter addresses two basic concepts: 1) the masses of molecules and salts at both the atomic and macroscopic levels and 2) the number relationship between reacting species. 3.1 The Mole You were introduced briefly to the atomic mass unit in the previous chapter as a convenient way of discussin ...
Electrochemistry
Electrochemistry is the branch of physical chemistry that studies chemical reactions which take place at the interface of an electrode, usually a solid metal or a semiconductor, and an ionic conductor, the electrolyte. These reactions involve electric charges moving between the electrodes and the electrolyte (or ionic species in a solution). Thus electrochemistry deals with the interaction between electrical energy and chemical change.When a chemical reaction is caused by an externally supplied current, as in electrolysis, or if an electric current is produced by a spontaneous chemical reaction as in a battery, it is called an electrochemical reaction. Chemical reactions where electrons are transferred directly between molecules and/or atoms are called oxidation-reduction or (redox) reactions. In general, electrochemistry describes the overall reactions when individual redox reactions are separate but connected by an external electric circuit and an intervening electrolyte.