Problem 1E: A burning match and a bonfire may have the same temperature, yet you would not sit around a burning... Problem 2E: Prepare a table identifying several energy transitions that take place during the typical operation... Problem 3E: Explain the difference between heat capacity and specific heat of a substance. Problem 4E: Calculate the heat capacity, in joules and in calories per degree, of the following: (a) 28.4 g of... Problem 5E: Calculate the heat capacity, in joules and in calories per degree, of the following: (a) 45.8 g of... Problem 6E: How much heat, in joules and in calories, must be added to a 75.0g iron block with a specific heat... Problem 7E: How much heat, in joules and in calories, is required to heat a 28.4-g (1-oz) ice cube from 23.0 C... Problem 8E: How much would the temperature of 275 g of water increase if 36.5 U of heat were added? Problem 9E: If 14.5 kJ of heat were added to 485 g of liquid water, how much would its temperature increase? Problem 10E: A piece of unknown substance weighs 44.7 g and requires 2110 J to increase its temperature from 23.2... Problem 11E: A piece of unknown solid substance weighs 437.2 g, and requires 8460 J to increase its temperature... Problem 12E: An aluminum kettle weighs 1.05 kg. (a) What is the heat capacity of the kettle? (b) How much heat is... Problem 13E: Most people find waterbeds uncomfortable unless the water temperature is maintained at about 85 F.... Problem 14E: A 500-mL bottle of water at room temperature and a 2-L bottle of water at the same temperature were... Problem 15E: Would the amount of heat measured for the reaction in Example 5.5 be greater, lesser, or remain the... Problem 16E: Would the amount of heat absorbed by the dissolution in Example 5.6 appear greater, lesser, or... Problem 17E: Would the amount of heat absorbed by the dissolution in Example 5.6 appear greater, lesser, or... Problem 18E: How many milliliters of water at 23 C with a density of 1.00 g/mL must be mixed with 180 mL (about 6... Problem 19E: How much will the temperature of a cup (180 g) of coffee at 95 C be reduced when a 45 g silver spoon... Problem 20E: A 45-g aluminum spoon (specific heat 0.88 J/g C) at 24 C is placed in 180 mL (180 g) of coffee at 85... Problem 21E: The temperature of the cooling water as it leaves the hot engine of an automobile is 240 F. After it... Problem 22E: A 70.0-g piece of metal at 80.0 °C is placed in loo g of water at 22.0 °C contained in a calorimeter... Problem 23E: If a reaction produces 1.506 kJ of heat, which is trapped in 30.0 g of water initially at 26.5 °C in... Problem 24E: A 0.500-g sample of KCl is added to 50.0 g of water in a calorimeter (Figure 5.12). If the... Problem 25E: Dissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter (Figure 5.12) at 22.4 °C causes... Problem 26E: When 50.0 g of 0.200 M NaCl(aq) at 24.1 C is added to 100.0 g of 0.100 M AgNO3(aq) at 24.1 C in a... Problem 27E: The addition of 3.15 g of Ba(OH)28H2O to a solution of 1.52 g of NH4SCN in loo g of water in a... Problem 28E: The reaction of 50 mL of acid and 50 mL of base described in Example 5.5 increased the temperature... Problem 29E: If the 3.21 g of NH4NO3 in Example 5.6 were dissolved in 100.0 g of water under the same conditions,... Problem 30E: When 1.0 g of fructose, C6H12O6(s), a sugar commonly found in fruits, is burned in oxygen in a bomb... Problem 31E: When a 0.740-g sample of trinitrotoluene (TNT), C7H5N2O6, is burned in a bomb calorimeter, the... Problem 32E: One method of generating electricity is by burning coal to heat water, which produces steam that... Problem 33E: The amount of fat recommended for someone with a daily diet of 2000 Calories is 65 g. What percent... Problem 34E: A teaspoon of the carbohydrate sucrose (common sugar) contains 16 Calories (16 kcal). What is the... Problem 35E: What is the maximum mass of carbohydrate in a 6-oz serving of diet soda that contains less than 1... Problem 36E: A pint of premium ice cream can contain 1100 Calories. What mass of fat, in grams and pounds, must... Problem 37E: A serving of a breakfast cereal contains 3 g of protein, 18 g of carbohydrates, and 6 g of fat. What... Problem 38E: Which is the least expensive source of energy in kilojoules per dollar: a box of breakfast cereal... Problem 39E: Explain how the heat measured in Example 5.5 differs from the enthalpy change for the exothermic... Problem 40E: Using the data in the check your learning section of Example 5.5, calculate H in kJ/mol of AgNO3(aq)... Problem 41E: Calculate the enthalpy of solution ( H for the dissolution) per mole of NH4NO3 under the conditions... Problem 42E: Calculate H for the reaction described by the equation. (Hint : use the value for the approximate... Problem 43E: Calculate the enthalpy of solution ( H for the dissolution) per mole of CaCl2 (refer to exercise... Problem 44E: Although the gas used in an oxyacetylene torch (Figure 5.7) is essentially pure acetylene, the heat... Problem 45E: How much heat is produced by burning 4.00 moles of acetylene under standard state conditions? Problem 46E: How much heat is produced by combustion of 125 g of methanol under standard state conditions? Problem 47E: How many moles of isooctane must be burned to produce loo U of heat under standard state conditions? Problem 48E: What mass of carbon monoxide must be burned to produce 175 kJ of heat under standard state... Problem 49E: When 2.50 g of methane burns in oxygen, 125 kJ of heat is produced. What is the enthalpy of... Problem 50E: How much heat is produced when loo mL of 0.250 M HCl (density, 1.00 g/mL) and 200 mL of 0.150 M NaOH... Problem 51E: A sample of 0.562 g of carbon is burned in oxygen in a bomb calorimeter, producing carbon dioxide.... Problem 52E: Before the introduction of chlorofluorocarbons, sulfur dioxide (enthalpy of vaporization, 6.00... Problem 53E: Homes may be heated by pumping hot water through radiators. What mass of water will provide the same... Problem 54E: Which of the enthalpies of combustion in Table 5.2 the table are also standard enthalpies of... Problem 55E: Does the standard enthalpy of formation of H2O(g) differ from H for the reaction... Problem 56E: Joseph Priestly prepared oxygen in 1774 by heating red mercury(II) oxide with sunlight focused... Problem 57E: How many kilojoules of heat will be released when exactly 1 mole of manganese, Mn, is burned to form... Problem 58E: How many kilojoules of heat will be released when exactly 1 mole of iron, Fe, is burned to form... Problem 59E: The following sequence of reactions occurs in the commercial production of aqueous nitric acid:... Problem 60E: Both graphite and diamond burn. C(s,graphite)+O2(g)CO2(g) For the conversion of graphite to diamond:... Problem 61E: From the molar heats of formation in Appendix G, determine how much heat is required to evaporate... Problem 62E: Which produces more heat? Os(s)2O2(g)OsO4(s)orOs(s)2O2(g)OsO4(g) for the phase change... Problem 63E: Calculate H298 for the process Sb(s)+52Cl2(g)SbCl4(s) from the following information:... Problem 64E: Calculate H298 for the process Zn(s)+S(s)+2O2(g)ZnSO4(s) from the following information:... Problem 65E: Calculate H for the process Hg2Cl2(s)2Hg(l)+Cl2(g) from the following information:... Problem 66E: Calculate H298 for the process Co3O4(s)3Co(s)+2O2(g) from the following information:... Problem 67E: Calculate the standard molar enthalpy of formation of NO(g) from the following data:... Problem 68E: Using the data in Appendix G, calculate the standard enthalpy change for each of the following... Problem 69E: Using the data in Appendix G, calculate the standard enthalpy change for each of the following... Problem 70E: The following reactions can be used to prepare samples of metals. Determine the enthalpy change... Problem 71E: The decomposition of hydrogen peroxide, H2O2, has been used to provide thrust in the control jets of... Problem 72E: Calculate the enthalpy of combustion of propane, C3H8(g), for the formation of H2O(g) and CO2(g).... Problem 73E: Calculate the enthalpy of combustion of butane, C4H10(g) for the formation of H2O(g) and CO2(g). The... Problem 74E: Both propane and butane are used as gaseous fuels. Which compound produces more heat per gram when... Problem 75E: The white pigment TiO2 is prepared by the reaction of titanium tetrachioride, TiCl4, with water... Problem 76E: Water gas, a mixture of H2 and CO, is an important industrial fuel produced by the reaction of steam... Problem 77E: In the early days of automobiles, illumination at night was provided by burning acetylene, C2H2.... Problem 78E: From the data in Table 5.2, determine which of the following fuels produces the greatest amount of... Problem 79E: The enthalpy of combustion of hard coal averages 35 kJ/g, that of gasoline, 1.28105 kJ/gal. How many... Problem 80E: Ethanol, C2H5OH, is used as a fuel for motor vehicles, particularly in Brazil. (a) Write the... Problem 81E: Among the substances that react with oxygen and that have been considered as potential rocket fuels... Problem 82E: How much heat is produced when 1.25 g of chromium meta’ reacts with oxygen gas under standard... Problem 83E: Ethylene, C2H2, a byproduct from the fractional distillation of petroleum, is fourth among the 50... Problem 84E: The oxidation of the sugar glucose, C6H12O6, is described by the following equation:... Problem 85E: Propane, C3H8, is a hydrocarbon that is commonly used as a fuel. (a) Write a balanced equation for... Problem 86E: During a recent winter month in Sheboygan, Wisconsin, it was necessary to obtain 3500 kWh of heat... format_list_bulleted
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