GC97F Pretest A - American Chemical Society
... be turned in with the test booklet at the end of the examination. Local Sections may use an answer sheet of their own choice. The full examination consists of 60 multiple-choice questions representing a fairly wide range of difficulty. Students should be permitted to use non-programmable calculators ...
... be turned in with the test booklet at the end of the examination. Local Sections may use an answer sheet of their own choice. The full examination consists of 60 multiple-choice questions representing a fairly wide range of difficulty. Students should be permitted to use non-programmable calculators ...
solutions - UMass Chemistry
... biological processes. NO gas reacts with oxygen to form brown NO2 gas as shown, with an enthalpy change for the reaction as given. What is the enthalpy of formation of NO2 (g)? Note that thermodynamic data are given on the last page of the exam. ...
... biological processes. NO gas reacts with oxygen to form brown NO2 gas as shown, with an enthalpy change for the reaction as given. What is the enthalpy of formation of NO2 (g)? Note that thermodynamic data are given on the last page of the exam. ...
X273/13/02
... ions according to the equation 2NO2– + 2I– + 4H+ → 2NO + I2 + 2H2O Addition of sodium ethanoate to the reaction mixture slows down the formation of iodine. The most likely explanation for this effect is ...
... ions according to the equation 2NO2– + 2I– + 4H+ → 2NO + I2 + 2H2O Addition of sodium ethanoate to the reaction mixture slows down the formation of iodine. The most likely explanation for this effect is ...
Spring Exam 4 - Chemistry
... D. High temperature and low pressure of CO2. 12. What is the concentration of CO2 in an opened soft drink with a partial pressure of CO2 of 2.6 10−3 atm over the liquid at 25C? The Henry’s Law constant for CO2 in water at 25C is 3.1 10−2 mol/Latm. ...
... D. High temperature and low pressure of CO2. 12. What is the concentration of CO2 in an opened soft drink with a partial pressure of CO2 of 2.6 10−3 atm over the liquid at 25C? The Henry’s Law constant for CO2 in water at 25C is 3.1 10−2 mol/Latm. ...
Multiple Choice Practice. A) P B) S C) Cl D) Li E) 1 F 1. Has the
... When the half reaction above is balanced, how many moles of electrons are needed for every mole of I2 formed by this half-reaction? A) 2 B) 6 C) 8 D) 10 E) 12 30. Which of the following is always true at the triple point of a pure substance? A) The vapor pressure of the solid phase equals the vapor ...
... When the half reaction above is balanced, how many moles of electrons are needed for every mole of I2 formed by this half-reaction? A) 2 B) 6 C) 8 D) 10 E) 12 30. Which of the following is always true at the triple point of a pure substance? A) The vapor pressure of the solid phase equals the vapor ...
Chemistry Final Exam Review 2006-2007
... 6. How does rate change if you increase the concentration of the reactants? 7. How does rate change if you increase the surface area? 8. How does rate change if you decrease the temperature? 9. How does rate change if you add a catalyst? 10. Write the equilibrium expression for the following reactio ...
... 6. How does rate change if you increase the concentration of the reactants? 7. How does rate change if you increase the surface area? 8. How does rate change if you decrease the temperature? 9. How does rate change if you add a catalyst? 10. Write the equilibrium expression for the following reactio ...
PRACTICE FINAL EXAM CHEMISTRY 152 This
... 12. What information can be obtained directly or calculated from graphs of the integrated rate laws?(time vs 1/[X], time vs ln[X], etc) A. The rate constant from the slope of the line. B. The initial concentration from the y intercept C. The order of the reaction (0 order, vs 1st order vs 2nd order ...
... 12. What information can be obtained directly or calculated from graphs of the integrated rate laws?(time vs 1/[X], time vs ln[X], etc) A. The rate constant from the slope of the line. B. The initial concentration from the y intercept C. The order of the reaction (0 order, vs 1st order vs 2nd order ...
Question paper - Edexcel
... Answer ALL the questions in this section. You should aim to spend no more than 20 minutes on this section. For each question, select one answer from A to D and put a cross in the box . and then mark your new answer with a If you change your mind, put a line through the box cross . 1 In which of the ...
... Answer ALL the questions in this section. You should aim to spend no more than 20 minutes on this section. For each question, select one answer from A to D and put a cross in the box . and then mark your new answer with a If you change your mind, put a line through the box cross . 1 In which of the ...
chapter 9: aqueous solutions
... be the concentration of potassium sulfide if the reaction is complete (no leftover reactants)? b) What will be the concentration of potassium ions in the reaction mixture at the end of the reaction? ...
... be the concentration of potassium sulfide if the reaction is complete (no leftover reactants)? b) What will be the concentration of potassium ions in the reaction mixture at the end of the reaction? ...
1. All the questions are compulsory. 2. Q. N
... Use of calculators is not allowed, use log tables wherever required. 1. Name the non stoichiometric point defect responsible for colour in alkali metal halides. 2. What is shape selective catalysis? 3. Amongst the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical ch ...
... Use of calculators is not allowed, use log tables wherever required. 1. Name the non stoichiometric point defect responsible for colour in alkali metal halides. 2. What is shape selective catalysis? 3. Amongst the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical ch ...
Chemistry - CBSE Academic
... Use of calculators is not allowed, use log tables wherever required. 1. Name the non stoichiometric point defect responsible for colour in alkali metal halides. 2. What is shape selective catalysis? 3. Amongst the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical ch ...
... Use of calculators is not allowed, use log tables wherever required. 1. Name the non stoichiometric point defect responsible for colour in alkali metal halides. 2. What is shape selective catalysis? 3. Amongst the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical ch ...
Chapter 5: thermochemstry
... By carrying out a reaction in aqueous solution in a calorimeter, we can estimate the heat change for the system by measuring ΔT for the contents & calorimeter (the surroundings). ...
... By carrying out a reaction in aqueous solution in a calorimeter, we can estimate the heat change for the system by measuring ΔT for the contents & calorimeter (the surroundings). ...
- Cypress HS
... Many chemical reactions, especially those of organic substances, do not go to completion. Rather, they come to a point of chemical equilibrium before the reactants are fully converted to products. At the point of equilibrium, the concentrations of all reactants remain constant with time. The positio ...
... Many chemical reactions, especially those of organic substances, do not go to completion. Rather, they come to a point of chemical equilibrium before the reactants are fully converted to products. At the point of equilibrium, the concentrations of all reactants remain constant with time. The positio ...
2007 local exam - American Chemical Society
... 19. The standard enthalpy of formation for NH3(g) is –46.1 kJ.mol-1. Calculate ∆H˚ for the reaction: 2NH3(g) r N2(g) + 3H2(g) ...
... 19. The standard enthalpy of formation for NH3(g) is –46.1 kJ.mol-1. Calculate ∆H˚ for the reaction: 2NH3(g) r N2(g) + 3H2(g) ...
1999 Advanced Placement Chemistry Exam Section I: Multiple
... (C) all points on the curve between Q and S (A) The pressure on the walls of the balloon in(D) all points on the curve between R and T creases with increasing temperature. (E) no point on the curve (B) The difference in temperature between the air inside and outside the balloon produces ... C10H12O4 ...
... (C) all points on the curve between Q and S (A) The pressure on the walls of the balloon in(D) all points on the curve between R and T creases with increasing temperature. (E) no point on the curve (B) The difference in temperature between the air inside and outside the balloon produces ... C10H12O4 ...
M.Sc. 2015
... Dyotropic reaction is a rearrangement in which:two σ bonds simultaneously migrate intramolecularly in an uncatalyzed process. two σ bonds simultaneously migrate intramolecularly in a catalyzed process. two σ bonds simultaneously migrate intermolecularly in a catalyzed process. two σ bonds simultaneo ...
... Dyotropic reaction is a rearrangement in which:two σ bonds simultaneously migrate intramolecularly in an uncatalyzed process. two σ bonds simultaneously migrate intramolecularly in a catalyzed process. two σ bonds simultaneously migrate intermolecularly in a catalyzed process. two σ bonds simultaneo ...
- Gondwana University, Gadchiroli
... coefficient & Inversion temperature, calculations of W,Q,ΔE & ΔH for expansion of gases for isothermal & adiabatic conditions for reversible process, carnot’s cycle & its efficiency, thermodynamic scale of temperature. [5L] (C) Thermochemistry: Heat of reaction, standard states, relation between hea ...
... coefficient & Inversion temperature, calculations of W,Q,ΔE & ΔH for expansion of gases for isothermal & adiabatic conditions for reversible process, carnot’s cycle & its efficiency, thermodynamic scale of temperature. [5L] (C) Thermochemistry: Heat of reaction, standard states, relation between hea ...
Chemistry Final Exam Review 2006-2007
... 6. How does rate change if you increase the concentration of the reactants? 7. How does rate change if you increase the surface area? 8. How does rate change if you decrease the temperature? 9. How does rate change if you add a catalyst? 10. Write the equilibrium expression for the following reactio ...
... 6. How does rate change if you increase the concentration of the reactants? 7. How does rate change if you increase the surface area? 8. How does rate change if you decrease the temperature? 9. How does rate change if you add a catalyst? 10. Write the equilibrium expression for the following reactio ...
chemistry 110 final exam
... exerts a pressure of 1.26 atm at –4.0°C. What is the molecular formula of the compound? A. NO B. NO2 C. N2O4 D. N2O5 E. N3O6 -------------------------------------------------------------------------------------40. Which of these will have delocalized %-bonding? O ...
... exerts a pressure of 1.26 atm at –4.0°C. What is the molecular formula of the compound? A. NO B. NO2 C. N2O4 D. N2O5 E. N3O6 -------------------------------------------------------------------------------------40. Which of these will have delocalized %-bonding? O ...
Second exam 2014 with answers
... 6. (15) A 2.02 g sample of Al reacts with excess HCl (aq) and the liberated hydrogen is collected over water at a temperature of 24 oC. What is the total volume of the gas collected at a barometric pressure of 760.0 torr? (The vapor pressure of water at 24oC is 22.4 torr). The reaction is: 2 Al (s) ...
... 6. (15) A 2.02 g sample of Al reacts with excess HCl (aq) and the liberated hydrogen is collected over water at a temperature of 24 oC. What is the total volume of the gas collected at a barometric pressure of 760.0 torr? (The vapor pressure of water at 24oC is 22.4 torr). The reaction is: 2 Al (s) ...
Chapter 4 (Hill/Petrucci/McCreary/Perry Chemical Reactions in
... Chemical Reactions in Aqueous Solutions This chapter deals with reactions that occur in aqueous solution …these solutions all use water as the solvent. We will look at some properties of these solutions and also look briefly at three different general types of reactions that occur in aqueous solutio ...
... Chemical Reactions in Aqueous Solutions This chapter deals with reactions that occur in aqueous solution …these solutions all use water as the solvent. We will look at some properties of these solutions and also look briefly at three different general types of reactions that occur in aqueous solutio ...
CHEM102 Chemistry II Spring 11-12 Mid
... 19) In the process of dissolving sugar in water, the entropy increases. This means that the sign of ΔS is ________, and that the randomness of the system ________. 19) ______ A) negative; decreases B) undetermined; increases C) positive; decreases D) negative; increases E) positive; increases 20) Wh ...
... 19) In the process of dissolving sugar in water, the entropy increases. This means that the sign of ΔS is ________, and that the randomness of the system ________. 19) ______ A) negative; decreases B) undetermined; increases C) positive; decreases D) negative; increases E) positive; increases 20) Wh ...
Chapter 4 Reactions in Aqueous Solutions
... aqueous solutions) occurs when product is insoluble • Produce insoluble ionic compounds • Double replacement (or metathesis reaction) • Solubility is the maximum amount of a solid that can dissolve in a given amount of solvent at a specified temperature • Prediction based on solubility rules ...
... aqueous solutions) occurs when product is insoluble • Produce insoluble ionic compounds • Double replacement (or metathesis reaction) • Solubility is the maximum amount of a solid that can dissolve in a given amount of solvent at a specified temperature • Prediction based on solubility rules ...
energy and rates practice test answers
... For which one of the following substances is the standard enthalpy of formation, H°f, equal to zero? a. water [H2O(l)] d. carbon dioxide [CO2(g)] b. lead [Pb(s)] e. tin [Sn(g)] c. carbon dioxide [CO2(s)] Use the following data to determine the ΔH of vaporization for silicon tetrachloride at its boil ...
... For which one of the following substances is the standard enthalpy of formation, H°f, equal to zero? a. water [H2O(l)] d. carbon dioxide [CO2(g)] b. lead [Pb(s)] e. tin [Sn(g)] c. carbon dioxide [CO2(s)] Use the following data to determine the ΔH of vaporization for silicon tetrachloride at its boil ...
Thermometric titration
A thermometric titration is one of a number of instrumental titration techniques where endpoints can be located accurately and precisely without a subjective interpretation on the part of the analyst as to their location. Enthalpy change is arguably the most fundamental and universal property of chemical reactions, so the observation of temperature change is a natural choice in monitoring their progress. It is not a new technique, with possibly the first recognizable thermometric titration method reported early in the 20th century (Bell and Cowell, 1913). In spite of its attractive features, and in spite of the considerable research that has been conducted in the field and a large body of applications that have been developed; it has been until now an under-utilized technique in the critical area of industrial process and quality control. Automated potentiometric titration systems have pre-dominated in this area since the 1970s. With the advent of cheap computers able to handle the powerful thermometric titration software, development has now reached the stage where easy to use automated thermometric titration systems can in many cases offer a superior alternative to potentiometric titrimetry.The applications of thermometric titrimetry discussed on this page are by no means exhaustive. The reader is referred to the bibliography for further reading on the subject.