Chemistry: Principles and Practice
3rd Edition
ISBN: 9780534420123
Author: Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher: Cengage Learning
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Chapter 5, Problem 5.56QE
Interpretation Introduction
Interpretation:
Heat that must be removed to decrease the temperature has to be determined using the given data.
Concept Introduction:
The temperature change
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Chapter 5 Solutions
Chemistry: Principles and Practice
Ch. 5 - Why must the physical states of all reactants and...Ch. 5 - Why is chemical energy classified as a form of...Ch. 5 - What is the difference between the enthalpy of...Ch. 5 - Classify each process as exothermic or...Ch. 5 - Explain why the specific heat of the contents of...Ch. 5 - Prob. 5.6QECh. 5 - Define heat. What are its units? How does it...Ch. 5 - Prob. 5.8QECh. 5 - Prob. 5.9QECh. 5 - Prob. 5.10QE
Ch. 5 - Prob. 5.11QECh. 5 - Is the Sun exothermic or endothermic? Is it any...Ch. 5 - Under what circumstances is the heat of a process...Ch. 5 - Prob. 5.14QECh. 5 - Prob. 5.15QECh. 5 - Prob. 5.16QECh. 5 - Prob. 5.17QECh. 5 - Prob. 5.18QECh. 5 - Prob. 5.19QECh. 5 - Prob. 5.20QECh. 5 - Prob. 5.21QECh. 5 - Prob. 5.22QECh. 5 - Prob. 5.23QECh. 5 - Prob. 5.24QECh. 5 - Prob. 5.25QECh. 5 - Prob. 5.26QECh. 5 - Prob. 5.27QECh. 5 - Prob. 5.28QECh. 5 - Prob. 5.29QECh. 5 - Prob. 5.30QECh. 5 - Prob. 5.31QECh. 5 - A chemical reaction occurs and absorbs 64.7 cal....Ch. 5 - The enthalpy change for the following reaction is...Ch. 5 - Prob. 5.34QECh. 5 - The thermochemical equation for the burning of...Ch. 5 - When lightning strikes, the energy can force...Ch. 5 - One step in the manufacturing of sulfuric acid is...Ch. 5 - If nitric acid were sufficiently heated, it can be...Ch. 5 - Prob. 5.39QECh. 5 - Prob. 5.40QECh. 5 - Prob. 5.41QECh. 5 - The combustion of 1.00 mol liquid methyl alcohol...Ch. 5 - Another reaction that is used to propel rockets is...Ch. 5 - Prob. 5.44QECh. 5 - Prob. 5.45QECh. 5 - Prob. 5.46QECh. 5 - Prob. 5.47QECh. 5 - Prob. 5.48QECh. 5 - Prob. 5.49QECh. 5 - Prob. 5.50QECh. 5 - The enthalpy change when 1 mol methane (CH4) is...Ch. 5 - Prob. 5.52QECh. 5 - Prob. 5.53QECh. 5 - How much energy is required to raise the...Ch. 5 - How much heat, in kilojoules, must be removed to...Ch. 5 - Prob. 5.56QECh. 5 - Prob. 5.57QECh. 5 - Prob. 5.58QECh. 5 - Prob. 5.59QECh. 5 - Prob. 5.60QECh. 5 - When 7.11 g NH4NO3 is added to 100 mL water, the...Ch. 5 - A 50-mL solution of a dilute AgNO3 solution is...Ch. 5 - A 0.470-g sample of magnesium reacts with 200 g...Ch. 5 - Dissolving 6.00 g CaCl2 in 300 mL of water causes...Ch. 5 - Draw an energy-level diagram (e.g., see Figure...Ch. 5 - Prob. 5.66QECh. 5 - Prob. 5.67QECh. 5 - Prob. 5.68QECh. 5 - Calculate H for the reaction...Ch. 5 - Prob. 5.70QECh. 5 - Given the thermochemical equations...Ch. 5 - In the process of isolating iron from its ores,...Ch. 5 - Prob. 5.73QECh. 5 - Prob. 5.75QECh. 5 - Prob. 5.77QECh. 5 - Prob. 5.78QECh. 5 - Prob. 5.79QECh. 5 - Prob. 5.80QECh. 5 - Prob. 5.81QECh. 5 - Prob. 5.82QECh. 5 - Calculate H when a 38-g sample of glucose,...Ch. 5 - Prob. 5.84QECh. 5 - The octane number of gasoline is based on a...Ch. 5 - One of the components of jet engine fuel is...Ch. 5 - Prob. 5.87QECh. 5 - Prob. 5.88QECh. 5 - When a 2.30-g sample of magnesium dissolves in...Ch. 5 - Prob. 5.90QECh. 5 - Prob. 5.91QECh. 5 - What mass of acetylene, C2H2(g), must be burned to...Ch. 5 - It takes 677 J of heat to increase the temperature...Ch. 5 - Prob. 5.94QECh. 5 - Prob. 5.96QECh. 5 - The enthalpy of combustion of liquid n-hexane,...Ch. 5 - What is Hrxn for reaction of iron(III) oxide and...Ch. 5 - Prob. 5.99QECh. 5 - Prob. 5.100QECh. 5 - In the 1880s, Frederick Trouton noted that the...Ch. 5 - Prob. 5.102QECh. 5 - Prob. 5.103QECh. 5 - Prob. 5.104QECh. 5 - Prob. 5.105QECh. 5 - A compound is 82.7% carbon and 17.3% hydrogen, and...Ch. 5 - Prob. 5.107QECh. 5 - Prob. 5.108QE
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- Enthalpy a A 100.-g sample of water is placed in an insulated container and allowed to come to room temperature at 21C. To heat the water sample to 41C, how much heat must you add to it? b Consider the hypothetical reaction,2X(aq)+Y(l)X2Y(aq)being run in an insulated container that contains 100. g of solution. If the temperature of the solution changes from 21C to 31C, how much heat does the chemical reaction produce? How does this answer compare with that in part a? (You can assume that this solution is so dilute that it has the same heat capacity as pure water.) c If you wanted the temperature of 100. g of this solution to increase from 21C to 51C, how much heat would you have to add to it? (Try to answer this question without using a formula.) d If you had added 0.02 mol of X and 0.01 mol of Y to form the solution in part b, how many moles of X and Y would you need to bring about the temperature change described in part c. e Judging on the basis of your answers so far, what is the enthalpy of the reaction 2X(aq) + Y(l) X2Y(aq)?arrow_forwardHow much heat, in kilojoules, must be removed to decrease the temperature of a 20.0-g bar of aluminum from 34.2 C to 22.5 C? (See Table 5.1 for the specific heat of aluminum.) TABLE 5.1 Specific Heats of Some Common Substancesarrow_forwardHow much heat is required to raise the temperature of 100. grams of water from 25C near room temperature to 100.C its boiling point? The specific heat of water is approximately 4.2Jperg-K. a.3.2104J b.32J c.4.2104J d.76Jarrow_forward
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- Hydrogen is an ideal fuel in many respects; for example, the product of its combustion, water, is nonpolluting. The heat given off in burning hydrogen to gaseous water is 5.16 104 Btu per pound. What is this heat energy in joules per gram? (1 Btu = 252 cal; see also Table 1.4.)arrow_forward9.31 A metal radiator is made from 26.0 kg of iron. The specific heat of iron is 0.449Jg1C1 . How much heat must be supplied to the radiator to raise its temperature from 25.0 to 5 5.0°C?arrow_forwardHypothetical elements A2 and B2 react according to the following equation, forming the compound AB. A2(aq)+B2(aq)2AB(aq);H=+271kJ/mol If solutions A2(aq) and B2(aq), starting at the same temperature, are mixed in a coffee-cup calorimeter, the reaction that occurs is a exothermic, and the temperature of the resulting solution rises. b endothermic, and the temperature of the resulting solution rises. c endothermic, and the temperature of the resulting solution falls. d exothermic, and the temperature of the resulting solution falls. e exothermic or endothermic, depending on the original and final temperatures.arrow_forward
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