Problem 1QAP: Principles of Heat Flow Titanium is a metal used in jet engines. Its specific heat is 0.523 J/g C.... Problem 2QAP Problem 3QAP: Copper is used in building the integrated circuits, chips, and printed circuit boards for computers.... Problem 4QAP: Mercury was once used in thermometers and barometers. When 46.9 J of heat are absorbed by 100.0 g of... Problem 5QAP: The specific heat of aluminum is 0.902J/gC. How much heat is absorbed by an aluminum pie tin with a... Problem 6QAP: Chromium has a specific heat of 0.450J/gC. How much heat is absorbed by 35.0 g of chromium if the... Problem 7QAP: Magnesium sulfate is often used in first-aid hot packs, giving off heat when dissolved in water. A... Problem 8QAP: Sodium chloride is added in cooking to enhance the flavor of food. When 10.00 g of NaCl are... Problem 9QAP: When 375 mL of water (d=1.00g/mL) at 32C are mixed with 125 mL of water at 92C , what is the final... Problem 10QAP: How many mL of water at 10C (2 significant figures) must be added to 75 mL of water at 35C to obtain... Problem 11QAP: When one mol of KOH is neutralized by sulfuric acid, q=56 kJ. (This is called the heat of... Problem 12QAP: The heat of neutralization, Hneut, can be defined as the amount of heat released (or absorbed), q,... Problem 13QAP: Fructose is a sugar commonly found in fruit. A sample of fructose, C6H12O6, weighing 4.50 g is... Problem 14QAP: In earlier times, ethyl ether was commonly used as an anesthetic. It is, however, highly flammable.... Problem 15QAP: Isooctane is a primary component of gasoline and gives gasoline its octane rating. Burning 1.00 mL... Problem 16QAP: Ethyl alcohol, C2H5OH, is the intoxicating agent in liquor. Burning 1.00 g of ethyl alcohol in an... Problem 17QAP: Acetic acid, HC2H3O2, is responsible for the sour taste of vinegar. Combustion of acetic acid gives... Problem 18QAP: Acetylene, C2H2, is used in welding torches. It releases a lot of energy when burned in oxygen. The... Problem 19QAP: Salicylic acid, C7H6O3, is one of the starting materials in the manufacture of aspirin. When 1.00 g... Problem 20QAP: Methanol (CH3OH) is also known as wood alcohol and can be used as a fuel. When one mole of methanol... Problem 21QAP: Nitrogen oxide (NO) has been found to be a key component in many biological processes. It also can... Problem 22QAP: Small amounts of oxygen gas can be prepared in the laboratory by decomposing potassium chlorate with... Problem 23QAP: In the late eighteenth century Priestley prepared ammonia by reacting HNO3(g) with hydrogen gas. The... Problem 24QAP Problem 25QAP: Strontium metal is responsible for the red color in fireworks. Fireworks manufacturers use strontium... Problem 26QAP: Nitroglycerin, C3H5(NO3)3(l), is an explosive most often used in mine or quarry blasting. It is a... Problem 27QAP: A typical fat in the body is glyceryl trioleate, C57H104O6. When it is metabolized in the body, it... Problem 28QAP: Use the same fat described in Question 27. (a) Write a thermochemical equation for the metabolism of... Problem 29QAP: Which requires the absorption of a greater amount of heat—vaporizing 100.0 g of benzene or boiling... Problem 30QAP: Which evolves more heat—freezing 100.0 g of benzene or 100.0 g of bromine? Problem 31QAP: A student is asked to calculate the amount of heat involved in changing 10.0 g of liquid bromine at... Problem 32QAP: Follow the step-wise process outlined in Problem 31 to calculate the amount of heat involved in... Problem 33QAP: A lead ore, galena, consisting mainly of lead(II) sulfide, is the principal source of lead. To... Problem 34QAP: A reaction used to produce the silicon for semiconductors from sand (SiO2), can be broken up into... Problem 35QAP: Given the following thermochemical equations, C2H2(g)+52... Problem 36QAP: Given the following thermochemical equations: 4B(s)+3O2(g)2B2O3(s)H=2543.8kJ H2(g)+12... Problem 37QAP: Write thermochemical equations for the decomposition of one mole of the following compounds into the... Problem 38QAP: Write thermochemical equations for the formation of one mole of the following compounds from the... Problem 39QAP: Given 2Al2O3(s)4Al(s)+3O2(g)H=3351.4kJ (a) What is the heat of formation of aluminum oxide? (b) What... Problem 40QAP: Given 2Cr2O3(s)4Cr(s)+3O2(g)H=+2269.4kJ (a) What is the heat of formation of chromium(III) oxide?... Problem 41QAP: Limestone, CaCO3, when subjected to a temperature of 900C in a kiln, decomposes to calcium oxide and... Problem 42QAP: When hydrazine reacts with oxygen, nitrogen gas and steam are formed. (a) Write a thermochemical... Problem 43QAP: Use Table 8.3 to obtain AHO for the following thermochemical equations: (a)... Problem 44QAP: Use Table 8.3 to obtain H for the following chemical equations: (a) Zn(s)+2 H+(aq)Zn2+(aq)+H2(g) (b)... Problem 45QAP: Use the appropriate tables to calculate H for (a) the reaction between copper(II) oxide and carbon... Problem 46QAP: Use the appropriate tables to calculate H for (a) the reaction between MgC03(s) and a strong acid to... Problem 47QAP: When one mole of nitroglycerine, C3H5(NO3)3(l) decomposes, nitrogen, oxygen, carbon dioxide, and... Problem 48QAP: When one mole of calcium carbonate reacts with ammonia, solid calcium cyanamide, CaCN2, and liquid... Problem 49QAP: Chlorine trifluoride is a toxic, intensely reactive gas. It was used in World War II to make... Problem 50QAP: When one mole of ethylene gas, C2H4, reacts with fluorine gas, hydrogen fluoride and carbon... Problem 51QAP: Glucose, C6H12O6(s), (H f =1275.2kJ/mol) is converted to ethyl alcohol, C2H5OH(l), and carbon... Problem 52QAP: When ammonia reacts with dinitrogen oxide gas (H f =82.05kJ/mol), liquid water and nitrogen gas are... Problem 53QAP: How many kJ are equal to 3.27 L atm of work? Problem 54QAP: How many L atm are equal to 12.2 kJ of work? Problem 55QAP: Find (a) E when a gas absorbs 18 J of heat and has 13 J of work done on it. (b) q when 72 J of work... Problem 56QAP: Calculate (a) q when a system does 54 J of work and its energy decreases by 72 J. (b) E for a gas... Problem 57QAP: Consider the following reaction in a vessel with a movable piston. R(g)+T(g)X(g)As the reaction... Problem 58QAP: Consider the following reaction in the vessel described in Question 57. A(g)+B(g)C(s)For this... Problem 59QAP: Determine the difference between H and E at 25C for 2CO(g)+O2(g)2CO2(g) Problem 60QAP: For the vaporization of one mole of bromine at 59C, determine (a) H (Table 8.2) (b) PV(c) E Problem 61QAP: Consider the combustion of propane, C3H8, the fuel that is commonly used in portable gas barbeque... Problem 62QAP: Consider the combustion of one mole of methyl alcohol, CH3OH(l), which yields carbon dioxide gas and... Problem 63QAP: Butane gas, C4H10, is sold to campers as bottled fuel. Its density at 25C and 1.00 atm is 2.38 g/L.... Problem 64QAP: The BTU (British thermal unit) is the unit of energy most commonly used in the United States. One... Problem 65QAP: Natural gas companies in the United States use the therm as a unit of energy. One therm is 1105 BTU.... Problem 66QAP Problem 67QAP: Given the following reactions, N2H4(l)+O2(g)N2(g)+2H2O(g)H=534.2kJ H2(g)+12 O2(g)H2O(g)H=241.8kJ... Problem 68QAP: In World War II, the Germans made use of otherwise unusable airplane parts by grinding them up into... Problem 69QAP Problem 70QAP: Consider the reaction between methane and oxygen producing carbon dioxide and water. Suppose that... Problem 71QAP: Consider burning ethane gas, C2H6 in oxygen (combustion) forming CO2 and water. (a) How much energy... Problem 72QAP: On complete combustion at constant pressure, a 1.00-L sample of a gaseous mixture at 0C and 1.00 atm... Problem 73QAP: Microwave ovens convert radiation to energy. A microwave oven uses radiation with a wavelength of... Problem 74QAP: In 2010, 3.30109 gallons of gasoline were consumed in the United States. The following assumptions... Problem 75QAP: Some solar-heated homes use large beds of rocks to store heat. (a) How much heat is absorbed by... Problem 76QAP: Consider a solution prepared by dissolving 10.00 g of NaOH in 1.00 L of water. (a) When the solid... Problem 77QAP: Draw a cylinder with a movable piston containing six molecules of a liquid. A pressure of 1 atm is... Problem 78QAP: Redraw the cylinder in Question 77 after work has been done on the system. Problem 79QAP: Which statement(s) is/are true about bond enthalpy? (a) The bond energy for a triple bond between A... Problem 80QAP: Equal masses of liquid A, initially at 100C, and liquid B, initially at 50C, are combined in an... Problem 81QAP: Determine whether the statements given below are true or false. Consider an endothermic process... Problem 82QAP: An exothermic reaction is carried out in a coffee-cup calorimeter. Which of the following statements... Problem 83QAP: Determine whether the statements given below are true or false. Consider enthalpy (H). (a) It is a... Problem 84QAP: Microwave ovens emit microwave radiation that is absorbed by water. The absorbed radiation is... Problem 85QAP: On a hot day, you take a six-pack ot a on a pcmc, cooling it with ice. Each empty (aluminum) can... Problem 86QAP Problem 87QAP: The thermite reaction was once used to weld rails: 2Al(s)+Fe2O3(s)Al2O3(s)+2Fe(s)(a) Using heat of... Problem 88QAP: A sample of sucrose, C12H22O11, is contaminated by sodium chloride. When the contaminated sample is... Problem 89QAP: A wad of steel wool (specific heat=0.45J/gC) at 25C is misplaced in a microwave oven, which later is... Problem 90QAP: Consider a metal ion A2+ and its nitrate salt, In an experiment, 35.00 mL of a 0.217 M solution of... format_list_bulleted
World of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning
General Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning