Basic Chemistry (5th Edition)
5th Edition
ISBN: 9780134138046
Author: Karen C. Timberlake
Publisher: PEARSON
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Textbook Question
Chapter 9.6, Problem 9.33QAP
In an exothermic reaction, is the energy of the products higher or lower than that of the reactants?
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Basic Chemistry (5th Edition)
Ch. 9.1 - Calculate the total mass of the reactants and the...Ch. 9.1 - Calculate the total mass of the reactants and the...Ch. 9.2 - 9.3 Write all of the mole-mole factors for each of...Ch. 9.2 - Prob. 9.4QAPCh. 9.2 - Prob. 9.5QAPCh. 9.2 - Prob. 9.6QAPCh. 9.2 - Prob. 9.7QAPCh. 9.2 - Ammonia is produced by the reaction of nitrogen...Ch. 9.2 - Prob. 9.9QAPCh. 9.2 - Prob. 9.10QAP
Ch. 9.3 - Sodium reacts with oxygen to produce sodium oxide....Ch. 9.3 - Nitrogen gas reacts with hydrogen gas to produce...Ch. 9.3 - Prob. 9.13QAPCh. 9.3 - lron (III) oxide reacts with carbon to give iron...Ch. 9.3 - Nitrogen dioxide and water react to produce nitric...Ch. 9.3 - Calcium cyanamide, CaCN2 , reacts with water to...Ch. 9.3 - When solid lead(II) sulfide reacts with oxygen...Ch. 9.3 - When the gases dihydrogen sulfide and oxygen...Ch. 9.4 - Prob. 9.19QAPCh. 9.4 - A clock maker has 15 clock faces. Each clock...Ch. 9.4 - Prob. 9.21QAPCh. 9.4 - Prob. 9.22QAPCh. 9.4 - 9.23 For each of the following reactions, 20.0 g...Ch. 9.4 - For each of the following reactions. 20.0 g of...Ch. 9.4 - Prob. 9.25QAPCh. 9.4 - Prob. 9.26QAPCh. 9.5 - 9.27 Carbon disulfide is produced by the reaction...Ch. 9.5 - Prob. 9.28QAPCh. 9.5 - Prob. 9.29QAPCh. 9.5 - Prob. 9.30QAPCh. 9.5 - Prob. 9.31QAPCh. 9.5 - Prob. 9.32QAPCh. 9.6 - In an exothermic reaction, is the energy of the...Ch. 9.6 - Prob. 9.34QAPCh. 9.6 - Prob. 9.35QAPCh. 9.6 - Classify each of the following as exothermic or...Ch. 9.6 - Prob. 9.37QAPCh. 9.6 - Prob. 9.38QAPCh. 9.6 - Prob. 9.39QAPCh. 9.6 - Prob. 9.40QAPCh. 9.6 - Prob. 9.41QAPCh. 9.6 - Calculate the enthalpy change for the reaction...Ch. 9.6 - Prob. 9.43QAPCh. 9.6 - Prob. 9.44QAPCh. 9 - Prob. 9.45FUCh. 9 - Prob. 9.46FUCh. 9 - Prob. 9.47UTCCh. 9 - Prob. 9.48UTCCh. 9 - Prob. 9.49UTCCh. 9 - Prob. 9.50UTCCh. 9 - Prob. 9.51UTCCh. 9 - If green spheres represent chlorine atoms and red...Ch. 9 - Prob. 9.53UTCCh. 9 - Prob. 9.54UTCCh. 9 - When ammonia NH3 reacts with fluorine F2 , the...Ch. 9 - Gasohol is a fuel that contains ethanol C2H6O that...Ch. 9 - When hydrogen peroxide H2O2 is used in rocket...Ch. 9 - Propane gas, C3H8 , reacts with oxygen to produce...Ch. 9 - When 12.8 g of Na and 10.2 g of Cl2 react, what is...Ch. 9 - If 35.8 g of CH4 and 75.5 g of S react, how many...Ch. 9 - Pentane gas, C5H12 , reacts with oxygen to produce...Ch. 9 - When nitrogen dioxide NO2 from car exhaust...Ch. 9 - The gaseous hydrocarbon acetylene, C2H2 , used in...Ch. 9 - The equation for the decomposition of potassium...Ch. 9 - When 28.0 g of acetylene reacts with hydrogen....Ch. 9 - When 50.0 g of iron(III) oxide reacts with carbon...Ch. 9 - Nitrogen and hydrogen combine to form ammonia....Ch. 9 - Prob. 9.68AQAPCh. 9 - The equation for the reaction of nitrogen and...Ch. 9 - The equation for the reaction of iron and oxygen...Ch. 9 - Each of the following is a reaction that occurs in...Ch. 9 - Each of the following is a reaction that occurs in...Ch. 9 - Prob. 9.73CQCh. 9 - Prob. 9.74CQCh. 9 - Prob. 9.75CQCh. 9 - Prob. 9.76CQCh. 9 - Prob. 9.77CQCh. 9 - Prob. 9.78CQCh. 9 - Prob. 9.79CQCh. 9 - Prob. 9.80CQCh. 9 - Prob. 9.81CQCh. 9 - Prob. 9.82CQ
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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_forward9.58 For the reaction C2H2(g)+2H2(g)C2H6,H=136 kJ. What are the ratios that can be defined between moles of substances and energy?arrow_forwardAn exothermic reaction is carried out in a coffee-cup calorimeter. Which of the following statements is/are NOT true for the process? (a) The temperature of the water increases. (b) Heat is absorbed by the water. (c) The enthalpy of the products is higher than the enthalpy of the reactants. (d) qH2o=qrxn (e) qrxn0 (f) qrxn+qH2o=0arrow_forward
- Describe a simple calorimeter. What measurements are needed to determine the heat of reaction?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_forwardExplain why the specific heat of the contents of the calorimeter must be known in a calorimetry experiment.arrow_forward
- How much heat is released when a mixture containing 10.0 g CS2 and 10.0 g Cl2 reacts by the following equation? CS2(g)+3Cl2(g)S2Cl2(g)+CCl4(g);H=230kJarrow_forwardDefine each of the following terms: a. heat b. energy c. work d. system e. surroundings f. exothermic reaction g. endothermic reaction h. enthalpy of reaction i. kinetic energy j. potential energyarrow_forwardFor the reaction HgO(s)Hg(l)+12O2(g),H=+90.7KJ: a. What quantity of heat is required to produce 1 mole of mercury by this reaction? b. What quantity of heat is required to produce 1 mole of oxygen gas by this reaction? c. What quantity of heat would be released in the following reaction as written? 2Hg(l)+O2(g)2HgO(s)arrow_forward
- What mass of acetylene, C2H2(g), must be burned to produce 3420 kJ of heat, given that its enthalpy of combustion is 1301 kJ/mol? Compare this with the answer to Exercise 5.91 and determine which substance produces more heat per gram.arrow_forwardDetermine whether the statements given below are true or false. Consider an endothermic process taking place in a beaker at room temperature. (a) Heat flows from the surroundings to the system. (b) The beaker is cold to the touch. (c) The pressure of the system decreases. (d) The value of q for the system is positive.arrow_forward
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