Chemical Principles
8th Edition
ISBN: 9781305581982
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 9, Problem 6DQ
Interpretation Introduction
Interpretation: The reason how extensive destruction of forests results in exacerbate the greenhouse effect should be explained.
Concept Introduction: The process by which plants turn carbon dioxide and water in presence of sunlight to oxygen and simple sugars is known as photosynthesis.
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Use the indicated average bond enthalpies to estimate the change in enthalpy, ΔHo, for the reaction between methane and iodine to produce iodomethane and hydrogen iodide:
CH4(g) + I2(g) → CH3I(g) + HI(g) ΔHo = ?
It may be helpful to draw the Lewis electron dot structure for each reactant and product; all reactants and products have single bonds.
average bond enthalpies (kJ)
C - H 413 , C - I 240 , H - I 299 , I - I 151
Express your answer in units of kilojoules, but do not include the units on your submitted answer.
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Chapter 9 Solutions
Chemical Principles
Ch. 9 - Objects placed together eventually reach the same...Ch. 9 - What is meant by the term lower in energy? Which...Ch. 9 - A fire is started in a fireplace by striking a...Ch. 9 - Liquid water turns to ice. Is this process...Ch. 9 - Consider the following statements: “Heat is a form...Ch. 9 - Prob. 6DQCh. 9 - Explain why oceanfront areas generally have...Ch. 9 - Predict the signs of q and w for the process of...Ch. 9 - Hess’s law is really just another statement of the...Ch. 9 - Prob. 10DQ
Ch. 9 - Prob. 11DQCh. 9 - Prob. 12DQCh. 9 - Prob. 13DQCh. 9 - Prob. 14DQCh. 9 - Prob. 15ECh. 9 - Consider the following potential energy diagrams...Ch. 9 - Consider an airplane trip from Chicago, Illinois,...Ch. 9 - Consider the following diagram when answering the...Ch. 9 - Assuming gasoline is pure C8H18(l) , predict the...Ch. 9 - Prob. 20ECh. 9 - Prob. 21ECh. 9 - A piston performs work of 210.Latm on the...Ch. 9 - A system undergoes a process consisting of the...Ch. 9 - Calculate the internal energy change for each of...Ch. 9 - Prob. 25ECh. 9 - Prob. 26ECh. 9 - One mole of H2O(g) at 1.00atm and 100.C occupies a...Ch. 9 - Prob. 28ECh. 9 - Prob. 29ECh. 9 - Prob. 30ECh. 9 - Prob. 31ECh. 9 - Are the following processes exothermic or...Ch. 9 - Prob. 33ECh. 9 - Prob. 34ECh. 9 - Prob. 35ECh. 9 - Prob. 36ECh. 9 - Prob. 37ECh. 9 - For the following reactions at constant pressure,...Ch. 9 - Calculate the energy required to heat 1.00kg of...Ch. 9 - Calculate q , w , E , and H for the process in...Ch. 9 - Consider 111J of heat added to 30.3g of Ne on STP...Ch. 9 - Consider a sample containing 2.00moles of a...Ch. 9 - Prob. 43ECh. 9 - The specific heat capacity of silver is...Ch. 9 - Consider the substances in Table9.3 . Which...Ch. 9 - A 150.0-g sample of a metal at 75.0C is added to...Ch. 9 - Prob. 47ECh. 9 - Prob. 48ECh. 9 - Prob. 49ECh. 9 - Prob. 50ECh. 9 - In a coffee cup calorimeter, 50.0mL of 0.100MAgNO3...Ch. 9 - In a coffee cup calorimeter, 100.0mL of 1.0MNaOH...Ch. 9 - A coffee cup calorimeter initially contains 125g...Ch. 9 - In a coffee cup calorimeter, 1.60g of NH4NO3 is...Ch. 9 - Prob. 55ECh. 9 - Consider the reaction...Ch. 9 - The heat capacity of a bomb calorimeter was...Ch. 9 - The combustion of 0.1584g benzoic acid increases...Ch. 9 - Prob. 59ECh. 9 - Calculate w and E when 1mole of a liquid is...Ch. 9 - Prob. 61ECh. 9 - Calculate H for the reaction...Ch. 9 - Given the following data:...Ch. 9 - Given the following data:...Ch. 9 - Prob. 65ECh. 9 - Given the following data:...Ch. 9 - Combustion reactions involve reacting a substance...Ch. 9 - Given the following data: 2O3(g)3O2(g)H=427kJ...Ch. 9 - Prob. 69ECh. 9 - Prob. 70ECh. 9 - Prob. 71ECh. 9 - The combustion of methane can be represented as...Ch. 9 - Prob. 73ECh. 9 - Prob. 74ECh. 9 - Calculate H for each of the following reactions...Ch. 9 - The reusable booster rockets of the space shuttle...Ch. 9 - Prob. 77ECh. 9 - Prob. 78ECh. 9 - At 298K , the standard enthalpies of formation for...Ch. 9 - Prob. 80ECh. 9 - Prob. 81ECh. 9 - The standard enthalpy of combustion of ethene gas...Ch. 9 - Prob. 83ECh. 9 - Prob. 84ECh. 9 - Prob. 85ECh. 9 - Assume that 4.19106kJ of energy is needed to heat...Ch. 9 - Prob. 87ECh. 9 - Prob. 88ECh. 9 - Prob. 89ECh. 9 - Some automobiles and buses have been equipped to...Ch. 9 - Consider the following cyclic process carried out...Ch. 9 - Determine E for the process H2O(l)H2O(g) at 25C...Ch. 9 - The standard enthalpy of formation of H2O(l) at...Ch. 9 - Prob. 94AECh. 9 - Prob. 95AECh. 9 - Prob. 96AECh. 9 - Prob. 97AECh. 9 - Prob. 98AECh. 9 - Prob. 99AECh. 9 - Prob. 100AECh. 9 - Prob. 101AECh. 9 - Prob. 102AECh. 9 - Prob. 103AECh. 9 - Prob. 104AECh. 9 - Prob. 105AECh. 9 - High-quality audio amplifiers generate large...Ch. 9 - Prob. 107AECh. 9 - Prob. 108AECh. 9 - Prob. 109AECh. 9 - Prob. 110AECh. 9 - Prob. 111AECh. 9 - Prob. 112AECh. 9 - Prob. 113AECh. 9 - Prob. 114AECh. 9 - Prob. 115AECh. 9 - The heat required to raise the temperature from...Ch. 9 - Prob. 117CPCh. 9 - Prob. 118CPCh. 9 - The heat of vaporization of water at the normal...Ch. 9 - Consider the following reaction at 248C and...Ch. 9 - Prob. 121CPCh. 9 - Prob. 122CPCh. 9 - Prob. 123CPCh. 9 - You have a 1.00-mole sample of water at -30.C ,...Ch. 9 - Prob. 125MPCh. 9 - A gaseous hydrocarbon reacts completely with...
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- Use the appropriate tables to calculate H for (a) the reaction between copper(II) oxide and carbon monoxide to give copper metal and carbon dioxide. (b) the decomposition of one mole of methyl alcohol (CH3OH) to methane and oxygen gases.arrow_forward1. What is the difference between the greenhouse effect and the enhanced greenhouse effect?arrow_forwardGiven that the reaction N2(g) + 2 O2(g) → 2 NO2(g) is endothermic, what is true of the reaction 2 NO2(g) → 2 N2(g) + 2 O2(g) ?arrow_forward
- A student performed the procedure described in the lab manual using 48.9 mL of 1.0 M HCl and 49.9 mL of 1.0 M NaOH. Reaction caused the temperature inside the calorimeter to increase from 17.9 oC to 24.7 oC. What is the value of the enthalpy change for this reaction (ΔHaqueous) in units of kJ/mol? (Enter your answer as a number without units.)arrow_forwardThe Sun supplies about 1.0 kilowatt of energy for each squaremeter of surface area (1.0 kW/m2, where a watt = 1 J/s).Plants produce the equivalent of about 0.20 g of sucrose(C12H22O11) per hour per square meter. Assuming that thesucrose is produced as follows, calculate the percentage ofsunlight used to produce sucrose.12 CO2(g)+ 11 H2O(l)-----> C12H22O11 + 12 O2(g)ΔH = 5645 kJarrow_forwardConsider the following chemical reaction which produces nitric oxide from its constituent elements: N2 (g) + O2 (g) → 2 NO (g) ArH= 182.6 kJ/mol If nitrogen and oxygen were mixed and allowed to react under constant pressure conditions, which of the following statements must be true? Select as many answers as applicable however points will be deducted for incorrect guesses. The temperature of the surroundings would increase This is an endothermic reaction ΔΗ = ΔU The temperature of the surroundings would decrease ΔΗ = qarrow_forward
- 6CO2(g) + 6H2O(l) → C6H12O6(s) + 6O2(g) ΔH = +2803 kJ/mol Calculate the mass (in grams) of O2 that is produced by photosynthesis when 24300 kJ of solar energy is consumed. Put your answer in scientific notation.arrow_forwardUsing the standard enthalpies of formation in the picture, calculate ΔHº for the following reactions:a) 2H2O2 (l) → 2H2O (l) + O2 (g) b) CH4 (g) + Cl2 (g) → CH3Cl (g) + HCl (g) c) HCl (g) + NaOH (s) → NaCl (s) + H2O (l)arrow_forward23.arrow_forward
- 2CH3OH(g)→2CH4(g)+O2(g),ΔH=+252.8 kJ For a given sample of CH3OH, the enthalpy change during the reaction is 82.9 kJ . What mass of methane gas is produced?arrow_forwardThe meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase a similar product called "Heater Meals." Just pour water into the heater unit, wait a few minutes, and you have a hot meal. The source of energy in the heater is Mg(s) + 2 H2O (ℓ) → Mg(OH)2(OH)2(s) + H2(g) The "heater meal" uses the reaction of magnesium with water as a source of energy as heat. Calculate the enthalpy change under standard conditions, in joules, for this reaction. 'What quantity of magnesium is needed to supply the energy required to warm 25 mL of water (d= 1.00 g/mL) from 25 °C to 85 °C? (See W.Jensen: Journal of Chemical Education,Vol. 77, pp.713·717, 2000.)arrow_forwardAt constant volume, the heat of combustion of a particular compound, compound A, is –3169.0 kJ/mol. When 1.859 g of compound A (molar mass = 110.41 g/mol) is burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 4.281 °C. What is the heat capacity (calorimeter constant) of the calorimeter? kJ/°C C = Suppose a 3.413 g sample of a second compound, compound B, is combusted in the same calorimeter, and the temperature rises from 23.07 °C to 28.88 °C. What is the heat of combustion per gram of compound B? kJ/g heat of combustion:arrow_forward
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