CHEMISTRY 313 PHYSICAL CHEMISTRY I Additional Problems for
... is 88◦ C. At this temperature the vapor pressures of pure A and B are 0.1276 bar and 0.0506 bar, respectively. (a) Is this solution ideal? (b) What is the initial composition of the vapor above the solution? III.14. For the two component, temperature-composition, solid-liquid diagram in Fig. 4, indi ...
... is 88◦ C. At this temperature the vapor pressures of pure A and B are 0.1276 bar and 0.0506 bar, respectively. (a) Is this solution ideal? (b) What is the initial composition of the vapor above the solution? III.14. For the two component, temperature-composition, solid-liquid diagram in Fig. 4, indi ...
CH 14-15 Chapter 14-15 review wkey
... given below. For an experiment in which the starting concentration of hydrogen peroxide is 0.110 M, what is the concentration of H2O2 450 minutes after the reaction begins? 2H2O2 2H2O + O2 k=1.33 x 10-4 min-1 a) 0.0961 M b) 0.104 M c) 0.117 M ...
... given below. For an experiment in which the starting concentration of hydrogen peroxide is 0.110 M, what is the concentration of H2O2 450 minutes after the reaction begins? 2H2O2 2H2O + O2 k=1.33 x 10-4 min-1 a) 0.0961 M b) 0.104 M c) 0.117 M ...
Chemistry Lesson 10 Describing Matter
... 2. Mass, volume, length, etc are examples of extensive properties. 3. These are things which can be measured physically, and the measurement would change if there was more or less of the matter present 4. For example, 10 cm3 of water weighs 10 grams. If I take away some water, it weighs less. ...
... 2. Mass, volume, length, etc are examples of extensive properties. 3. These are things which can be measured physically, and the measurement would change if there was more or less of the matter present 4. For example, 10 cm3 of water weighs 10 grams. If I take away some water, it weighs less. ...
Part I - American Chemical Society
... of this ID number because you will use the same number on both Parts II and III. Each item in Part I consists of a question or an incomplete statement that is followed by four possible choices. Select the single choice that best answers the question or completes the statement. Then use a pencil to b ...
... of this ID number because you will use the same number on both Parts II and III. Each item in Part I consists of a question or an incomplete statement that is followed by four possible choices. Select the single choice that best answers the question or completes the statement. Then use a pencil to b ...
Chapter 6: Chemical Equilibrium
... 2 SO2(g) + O2(g) is endothermic. Predict what will happen if the temperature is increased. a. Kc remains the same b. Kc decreases c. the pressure decreases d. more SO3(g) is produced * e. Kc increases T increase, reaction will shift to right side and Kc increase 10. Consider the following system, wh ...
... 2 SO2(g) + O2(g) is endothermic. Predict what will happen if the temperature is increased. a. Kc remains the same b. Kc decreases c. the pressure decreases d. more SO3(g) is produced * e. Kc increases T increase, reaction will shift to right side and Kc increase 10. Consider the following system, wh ...
Chapter 6 notes 2015
... The volume decreased with the same ratio for a decrease in temperature. Therefore, theoretically at – 273oC (absolute zero) a gas has no volume. Absolute zero is thought to be the lowest attainable temperature. Charles’ Law – If the pressure remains constant, the volume of a gas varies directl ...
... The volume decreased with the same ratio for a decrease in temperature. Therefore, theoretically at – 273oC (absolute zero) a gas has no volume. Absolute zero is thought to be the lowest attainable temperature. Charles’ Law – If the pressure remains constant, the volume of a gas varies directl ...
2H 2 O(g)
... A substance is at standard state when it is in its pure form at one atmosphere and the temperature of interest. Standard enthalpy (ΔH°) is when all reactants and products are in their standard states. Standard enthalpy of formation (ΔHf°) is the change in enthalpy that forms one mol of the compound ...
... A substance is at standard state when it is in its pure form at one atmosphere and the temperature of interest. Standard enthalpy (ΔH°) is when all reactants and products are in their standard states. Standard enthalpy of formation (ΔHf°) is the change in enthalpy that forms one mol of the compound ...
Chapter 19 CHEMICAL THERMODYNAMICS 19.1 SPONTANEOUS
... a) 1 mol of HCl(g): the particles in gases are more disordered. b) 2 mol of HCl(g): the 2-mol sample has twice the number of microstates. c) 1 mol of HCl(g): more complexity. The Third Law of Thermodynamics The entropy of a pure crystalline substance at absolute zero (0 K) is zero: S(0)= 0. At absol ...
... a) 1 mol of HCl(g): the particles in gases are more disordered. b) 2 mol of HCl(g): the 2-mol sample has twice the number of microstates. c) 1 mol of HCl(g): more complexity. The Third Law of Thermodynamics The entropy of a pure crystalline substance at absolute zero (0 K) is zero: S(0)= 0. At absol ...
CH 17 Study Guide with answer Key
... 7. true 8. true 9. false 10. false 11. true 12. true 13. Keq [SO3]2/[SO2]2[O2] 14. homogeneous 15. Keq 4.32 ...
... 7. true 8. true 9. false 10. false 11. true 12. true 13. Keq [SO3]2/[SO2]2[O2] 14. homogeneous 15. Keq 4.32 ...
Name: ______ Date
... c) Energy is the capacity to do work or to transfer heat. d) Kinetic energy is the energy of motion. There are two properties of a reacting system that determine whether a process at constant pressure and temperature can occur spontaneously. These are: a) kinetic and potential energy change b) heat ...
... c) Energy is the capacity to do work or to transfer heat. d) Kinetic energy is the energy of motion. There are two properties of a reacting system that determine whether a process at constant pressure and temperature can occur spontaneously. These are: a) kinetic and potential energy change b) heat ...
Separation of a Mixture
... A physical change is a change in a materials size, shape, or state of matter, but it is still the same material. It changes its physical appearance but not its composition. A mixture is a combination of different pure substances that still retains its own chemical identity and its own properties ...
... A physical change is a change in a materials size, shape, or state of matter, but it is still the same material. It changes its physical appearance but not its composition. A mixture is a combination of different pure substances that still retains its own chemical identity and its own properties ...
Equilibrium Reactions
... Equilibrium means balance or steadiness In chemistry, an equilibrium reaction is when there are two opposite reactions that are balanced. We tend to think that all reactions go in only one direction. What is called the forward reaction. CaCO3 (aq) + HCl (aq) CaCl2 (aq) + CO2 (g) + H2O (l) In t ...
... Equilibrium means balance or steadiness In chemistry, an equilibrium reaction is when there are two opposite reactions that are balanced. We tend to think that all reactions go in only one direction. What is called the forward reaction. CaCO3 (aq) + HCl (aq) CaCl2 (aq) + CO2 (g) + H2O (l) In t ...
Dissociation of a Diatomic Gas
... Let us consider the following simple model for a diatomic gas: a diatomic molecule consists of a pair of point-like atoms, each of mass m, separated by a rigid rod of length a. The rigid rod corresponds to the chemical bond, which requires an energy to break. Now, at any finite temperature T , we ...
... Let us consider the following simple model for a diatomic gas: a diatomic molecule consists of a pair of point-like atoms, each of mass m, separated by a rigid rod of length a. The rigid rod corresponds to the chemical bond, which requires an energy to break. Now, at any finite temperature T , we ...
AP Chemistry (Zumdahl) Chapter 1 Notes: Chemical Foundations
... b. Qualitative (not measured: color, phase, shape, ...) 2. Making a prediction 3. Do experiments to test the prediction Results can become new observations, causing this to be a cycle. B. Vocabulary 1. Observation Something that is witnessed and can be recorded 2. Theory (Model) a. Tested hypotheses ...
... b. Qualitative (not measured: color, phase, shape, ...) 2. Making a prediction 3. Do experiments to test the prediction Results can become new observations, causing this to be a cycle. B. Vocabulary 1. Observation Something that is witnessed and can be recorded 2. Theory (Model) a. Tested hypotheses ...
apchem - practice midterm_shs
... guessing will improve your score significantly; it may even lower your score, and it does take time. If, however, you are not sure of the correct answer but have some knowledge of the question and are able to eliminate one or more of the answer choices as wrong, your chance of getting the right answ ...
... guessing will improve your score significantly; it may even lower your score, and it does take time. If, however, you are not sure of the correct answer but have some knowledge of the question and are able to eliminate one or more of the answer choices as wrong, your chance of getting the right answ ...
Resumen Science I Trimestre II Parcial Definitions: Element: pure
... Exothermic change: energy is removed from the substance as it changes state. Give off heat. Condensation: the change of phase from gas to liquid , energy must be removed for condensation to occur. Removing energy slows the movement of gas particles which allows them to clump together. Condensation ...
... Exothermic change: energy is removed from the substance as it changes state. Give off heat. Condensation: the change of phase from gas to liquid , energy must be removed for condensation to occur. Removing energy slows the movement of gas particles which allows them to clump together. Condensation ...
Every reaction is reversible: A chemical reaction is in equilibrium
... This particular equilibrium constant, K, is known as the Partition Coefficient. It depends on the two immiscible liquids involved, the solute and the temperature. Iodine is much more soluble in Methylbenzene than in Water. The value of the partition coefficient is quite high. Solvent extraction is a ...
... This particular equilibrium constant, K, is known as the Partition Coefficient. It depends on the two immiscible liquids involved, the solute and the temperature. Iodine is much more soluble in Methylbenzene than in Water. The value of the partition coefficient is quite high. Solvent extraction is a ...
Analytical Chemistry/Pharmaceutical Analysis
... scheme to confirm the presence of certain, usually aqueous, ions or elements by performing a series of reactions that eliminate ranges of possibilities and then confirms suspected ions with a confirming test. Sometimes small carbon containing ions are included in such schemes. With modern instrument ...
... scheme to confirm the presence of certain, usually aqueous, ions or elements by performing a series of reactions that eliminate ranges of possibilities and then confirms suspected ions with a confirming test. Sometimes small carbon containing ions are included in such schemes. With modern instrument ...
Exercises to the Textbook “Physical Chemistry from
... b) The same house is heated under otherwise identical conditions by common electric heating, i. e., the amount of entropy of 30 Ct per second necessary for compensation of entropy loss is not transferred from outside but is generated in the house. The temperature in the house should be again 25 °C. ...
... b) The same house is heated under otherwise identical conditions by common electric heating, i. e., the amount of entropy of 30 Ct per second necessary for compensation of entropy loss is not transferred from outside but is generated in the house. The temperature in the house should be again 25 °C. ...
Chapter 17: Thermodynamics
... Thermodynamics: The study of interconversion of heat and other forms of energy. Internal energy (U): the sum of the kinetic and potential energies of the particles making up a system. State Function: a property of a system that depends only on its present state which is determined by variables such ...
... Thermodynamics: The study of interconversion of heat and other forms of energy. Internal energy (U): the sum of the kinetic and potential energies of the particles making up a system. State Function: a property of a system that depends only on its present state which is determined by variables such ...
Sample pages 2 PDF
... water in a pond during wintertime or steam and liquid water in dry cleaning shops. The phases can coexist along the lines (boundaries) delimiting them. Also, there is a well-defined point in which the three phases can coexist; this point is named the triple point. This triple point is unique for each ...
... water in a pond during wintertime or steam and liquid water in dry cleaning shops. The phases can coexist along the lines (boundaries) delimiting them. Also, there is a well-defined point in which the three phases can coexist; this point is named the triple point. This triple point is unique for each ...
33 C? (1)
... If the temperature is kept constant and the pressure is raised to 2 atmospheres, the volume will now be (1) 25 mL; (2) 50 mL; (3) 100 mL; (4) 200 mL. ___ 86. A liquid which evaporates rapidly at room temperature would most likely have a high (1) vapor pressure; (2) boiling point; (3) melting point; ...
... If the temperature is kept constant and the pressure is raised to 2 atmospheres, the volume will now be (1) 25 mL; (2) 50 mL; (3) 100 mL; (4) 200 mL. ___ 86. A liquid which evaporates rapidly at room temperature would most likely have a high (1) vapor pressure; (2) boiling point; (3) melting point; ...
File - wilson science WEBSITE
... 8. For a certain reactions at 25oC, the value of K is 1.2 x 10-3. At 50oC, the value of K is 3.4 x 10-1. This means that the reaction is a. exothermic b. endothermic c. more information is needed 9. Given the equation A(g) ↔ B(g) + 2C(g). At a particular temperature, K = 1.4 x 105. If you initially ...
... 8. For a certain reactions at 25oC, the value of K is 1.2 x 10-3. At 50oC, the value of K is 3.4 x 10-1. This means that the reaction is a. exothermic b. endothermic c. more information is needed 9. Given the equation A(g) ↔ B(g) + 2C(g). At a particular temperature, K = 1.4 x 105. If you initially ...
Experimental Section Materials Instrumentation Synthesis
... second microwave activation (10 x 1’, 300 W, 75 °C) and cooling to room temperature, the mixture was poured into distilled water (300 mL) and the precipitate was filtered off and washed with hot distilled water (300 mL) and hot EtOH (150 mL). The product was dried at 50 °C under vacuum (1.50 g, mass ...
... second microwave activation (10 x 1’, 300 W, 75 °C) and cooling to room temperature, the mixture was poured into distilled water (300 mL) and the precipitate was filtered off and washed with hot distilled water (300 mL) and hot EtOH (150 mL). The product was dried at 50 °C under vacuum (1.50 g, mass ...