Introductory Chemistry: A Foundation
9th Edition
ISBN: 9781337399425
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 10, Problem 15ALQ
Hydrogen gas and oxygen gas react violently to form water.
ol type='a'>
i>Sketch an energy-level diagram (like Fig. 10.5) for this reaction and explain it.
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Chapter 10 Solutions
Introductory Chemistry: A Foundation
Ch. 10.1 - at if energy were not conserved? How would this...Ch. 10.4 - u are calculating in a chemistry problem. What if...Ch. 10.5 - ercise 10.1 How many calories of energy correspond...Ch. 10.5 - ercise 10.2 Calculate the joules of energy...Ch. 10.5 - ercise 10.3 A 5.63-g sample of solid gold is...Ch. 10.5 - ercise 10.4 A 2.8-g sample of pure metal requires...Ch. 10.6 - Prob. 10.5SCCh. 10.7 - at if Hess’s law were not true? What are some...Ch. 10.7 - Prob. 10.6SCCh. 10.9 - Prob. 1CT
Ch. 10.10 - at if the first law of thermodynamics was true,...Ch. 10 - Prob. 1ALQCh. 10 - friend of yours reads that the process of water...Ch. 10 - ou place hot metal into a beaker of cold water. ol...Ch. 10 - Prob. 4ALQCh. 10 - Prob. 5ALQCh. 10 - xplain why aluminum cans make good storage...Ch. 10 - n Section 10.7, two characteristics of enthalpy...Ch. 10 - Prob. 8ALQCh. 10 - hat is meant by the term driving forces? Why are...Ch. 10 - Prob. 10ALQCh. 10 - Explain in your own words what is meant by the...Ch. 10 - Prob. 12ALQCh. 10 - What if energy was not conserved? How would this...Ch. 10 - The internal energy of a system is said to be the...Ch. 10 - Hydrogen gas and oxygen gas react violently to...Ch. 10 - Consider four 100.0-g samples of water, each in a...Ch. 10 - For each of the following situations ac. use the...Ch. 10 - Prob. 18ALQCh. 10 - Does the entropy of the system increase or...Ch. 10 - Prob. 20ALQCh. 10 - Prob. 1QAPCh. 10 - Prob. 2QAPCh. 10 - Prob. 3QAPCh. 10 - Prob. 4QAPCh. 10 - Prob. 5QAPCh. 10 - n Fig. 10.1, what kind of energy does ball A...Ch. 10 - Prob. 7QAPCh. 10 - f you spilled a cup of freshly brewed hot tea on...Ch. 10 - Prob. 9QAPCh. 10 - Prob. 10QAPCh. 10 - In studying heat flows for chemical processes,...Ch. 10 - When a chemical system evolves energy, where does...Ch. 10 - The combustion of methane, is an exothermic...Ch. 10 - Are the following processes exothermic or...Ch. 10 - What do we mean by thermodynamics? What is the...Ch. 10 - Prob. 16QAPCh. 10 - Prob. 17QAPCh. 10 - If q for a process is a positive number, then the...Ch. 10 - For an endothermic process, q will have a...Ch. 10 - A system absorbs 215 kJ of heat, and 116 kJ of...Ch. 10 - Prob. 21QAPCh. 10 - Prob. 22QAPCh. 10 - If 8.40 kJ of heat is needed to raise the...Ch. 10 - If it takes 654 J of energy to warm a 5.51-g...Ch. 10 - Prob. 25QAPCh. 10 - Prob. 26QAPCh. 10 - Covert the following numbers of kilojoules into...Ch. 10 - Prob. 28QAPCh. 10 - Prob. 29QAPCh. 10 - Prob. 30QAPCh. 10 - .5 kJ of heat is applied to a 1012-g block of...Ch. 10 - What quantity of heat energy must have en applied...Ch. 10 - If 125 J of heat energy is applied to a block of...Ch. 10 - If 100. J of heat energy is applied to a 25-g...Ch. 10 - What quantity of heat is required to raise the...Ch. 10 - Prob. 36QAPCh. 10 - The “Chemistry in Focus” segment Nature Has Hot...Ch. 10 - In the “Chemistry in Focus” segment Firewalking:...Ch. 10 - Prob. 39QAPCh. 10 - A _________ is a device used to determine the heat...Ch. 10 - The enthalpy change for the reaction of hydrogen...Ch. 10 - For the reaction kJ per mole of formed. Calculate...Ch. 10 - Prob. 43QAPCh. 10 - When ethanol (grain alcohol, is burned in oxygen,...Ch. 10 - Prob. 45QAPCh. 10 - Prob. 46QAPCh. 10 - Prob. 47QAPCh. 10 - Prob. 48QAPCh. 10 - Prob. 49QAPCh. 10 - Prob. 50QAPCh. 10 - Prob. 51QAPCh. 10 - Prob. 52QAPCh. 10 - Prob. 53QAPCh. 10 - Prob. 54QAPCh. 10 - Prob. 55QAPCh. 10 - Prob. 56QAPCh. 10 - Prob. 57QAPCh. 10 - Prob. 58QAPCh. 10 - Prob. 59QAPCh. 10 - Prob. 60QAPCh. 10 - If a reaction occurs readily but has an...Ch. 10 - Prob. 62QAPCh. 10 - Prob. 63QAPCh. 10 - Prob. 64QAPCh. 10 - Which of the following is an endothermic process?...Ch. 10 - Prob. 66APCh. 10 - Prob. 67APCh. 10 - Calculate the amount of energy required (in...Ch. 10 - If takes 1.25 kJ of energy to heat a certain...Ch. 10 - What quantity of heat energy would have to be...Ch. 10 - The specific heat capacity of gold is 0.13 J/g °C....Ch. 10 - Calculate the amount of energy required (in...Ch. 10 - If 10. J of heat is applied to 5.0-g samples of...Ch. 10 - A 50.1)-g sample of water at 100. °C is poured...Ch. 10 - A 25.0-g sample of pure iron at 85 °C is dropped...Ch. 10 - If 7.24 kJ of heat is applied to a 952-g block of...Ch. 10 - For each of the substances listed in Table 10.1,...Ch. 10 - A system releases 213 kJ of heat and has a...Ch. 10 - Prob. 79APCh. 10 - Calculate the enthalpy change when 5.00 g of...Ch. 10 - Prob. 81APCh. 10 - Prob. 82APCh. 10 - It has been determined that the body can generate...Ch. 10 - Prob. 84APCh. 10 - Prob. 85CPCh. 10 - The specific heat capacity of graphite is 0.71 J/g...Ch. 10 - A swimming pool, 10.0 in by 4.0 m, is filled with...Ch. 10 - Prob. 88CPCh. 10 - Prob. 89CP
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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_forwardThe heat of neutralization, Hneut, can be defined as the amount of heat released (or absorbed), q, per mole of acid (or base) neutralized. Hneut for nitric acid is -52 kJ/mol HNO3. At 27.3C, 50.00 mL of 0.743M HNO3 is neutralized by 1.00 M Sr(OH)2 in a coffee-cup calorimeter. (a) How many mL of Sr(OH)2 were used in the neutralization? (b) What is the final temperature of the resulting solution? (Use the assumptions in Question 11.)arrow_forwardThe equation for the fermentation of glucose to alcohol and carbon dioxide is: C6H12O6(aq) 2C2H5OH(aq) + 2CO2(g) The enthalpy change for the reaction is 67 kJ. Is this reaction exothermic or endothermic? Is energy, in the form of heat, absorbed or evolved as the reaction occurs?arrow_forward
- The enthalpy change for the reaction of hydrogen gas with fluorine gas (o produce hydrogen fluoride is 542 U for the equation as written: mg src=Images/HTML_99425-10-41QAP_image001.jpg alt="" align="top"/> l type='a'> What is the enthalpy change per mole of hydrogen fluoride produced? Is the reaction exothermic or endothermic as written? What would be the enthalpy change for the reverse of the given equation (that 1%, for the decomposition of HF into its constituent elements)?arrow_forwardA rebreathing gas mask contains potassium superoxide, KO2, which reacts with moisture in the breath to give oxygen. 4KO2(s)+2H2O(l)4KOH(s)+3O2(g) Estimate the grams of potassium superoxide required to supply a persons oxygen needs for one hour. Assume a person requires 1.00 102 kcal of energy for this time period. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 1.00 102 kcal of heat, calculate the amount of oxygen consumed and hence the amount of KO2 required. The ff0 for glucose(s) is 1273 kJ/mol.arrow_forwardWhen one mole of ethylene gas, C2H4, reacts with fluorine gas, hydrogen fluoride and carbon tetrafluoride gases are formed and 2496.7 kJ of heat are given off. What is Hf for CF4(g)?arrow_forward
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- The carbon dioxide exhaled in the breath of astronauts is often removed from the spacecraft by reaction with lithium hydroxide 2LiOH(s)+CO2(g)Li2CO3(s)+H2O(l) Estimate the grams of lithium hydroxide required per astronaut per day. Assume that each astronaut requires 2.50 103 kcal of energy per day. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 2.50 103 kcal of heat, calculate the amount of CO2 produced and hence the amount of LiOH required. The H for glucose(s) is 1273 kJ/mol.arrow_forwardWhat is Hrxn for reaction of iron(III) oxide and carbon monoxide to give iron metal and carbon dioxide gas? Use the following reactions: 4Fe(s)+3O2(g)2Fe2O3(s)H=1648.4kJ4CO(g)+O2(g)2CO3(g)H=565.98kJarrow_forward4.60 Why are fuel additives used?arrow_forward
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