CHEMISTRY-TEXT
8th Edition
ISBN: 9780134856230
Author: Robinson
Publisher: PEARSON
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Question
Chapter 9, Problem 9.29P
Interpretation Introduction
(a)
Interpretation:
The equation for the combustion of liquid ethanol needs to be balanced.
Concept introduction:
A
Interpretation Introduction
(b)
Interpretation:
The combustion enthalpy of ethanol in kJ/mol needs to be determined.
Concept introduction:
For a reaction as follows:
The value of enthalpy of reaction can be calculated as follows:
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1) Which of the following processes is endothermic?
a) melting of ice at 0oC
b) the reaction of methane and oxygen
c) cooling liquid water from 25oC to 0oC
2) Which of the following processes requires the largest input of energy?
a) warming 1.0 g Fe by 10.oC (SpH of Fe = 0.449 J/goC)
b) warming 2.0 g Cu by 10.oC (SpH of Cu = 0.385 J/goC)
c) warming 4.0 g Pb by 10.oC (SpH of Pb = 0.127 J/goC)
d) warming 3.0 g Ag by 10.oC (SpH of Ag = 0.236 J/goC)
3) Which of the following processes will lead to a decrease in the internal energy of a system?
1- energy is transferred as heat into a system
2- energy is transferred as heat from the system
3- energy is transferred as work done on the system
4- energy is transferred as work done by the system
a) 1 and 3
b) 2 and 4
c) 1 and 4
d) 2 and 3
The reaction of quicklime, CaO, with water produces slaked lime, Ca(OH)2, which is widely used in the construction industry to make mortar and plaster. The reaction of quicklime and water is highly exothermic:
CaO(s) + H2 O(l)⟶Ca(OH)2(s) ΔH = −350 kJ mol−1
(a) What is the enthalpy of reacTon per gram of quicklime that reacts?
(b) How much heat, in kilojoules, is associated with the producTon of 1 ton of slaked lime?
A 27.98 g sample of aluminum is heated from 25 oC to its melting point of 660 oC and then melted completely. How much energy was absorbed by the sample? (Answer in kJ)
S=0.91 J/goC Delta Hf = 10.7 kJ/mol
Chapter 9 Solutions
CHEMISTRY-TEXT
Ch. 9 - Prob. 9.1PCh. 9 - Conceptual APPLY 9.2 How much work is done in...Ch. 9 - PRACTICE 9.3 The reaction between hydrogen and...Ch. 9 - Conceptual APPLY 9.4 The following reaction has E...Ch. 9 - Use the following thermo chemical equation to...Ch. 9 - APPLY 9.6 Approximately, 1.8106 kJ of energy is...Ch. 9 - Classify the following reaction as end o- or ex...Ch. 9 - APPLY 9.8 Instant hot packs and cold packs contain...Ch. 9 - PRACTICE 9.9 What is the specific heat of lead in...Ch. 9 - APPLY 9.10 Calculate the heat capacity (C) of a...
Ch. 9 - PRACTICE 9.11 When 25.0 mL of 1.0 M H2SO4 is added...Ch. 9 - Prob. 9.12ACh. 9 - When 1.00 g of toluene, C7H8, is burned in a bomb...Ch. 9 - Prob. 9.14PCh. 9 - Water gas is the name for the mixture of CO and H2...Ch. 9 - Prob. 9.16ACh. 9 - Prob. 9.17PCh. 9 - Prob. 9.18ACh. 9 - Use the data in Table 9.3 to calculate an...Ch. 9 - Benzene ( C6H6 ) has two resonance structures,...Ch. 9 - Prob. 9.21PCh. 9 - Prob. 9.22ACh. 9 - Prob. 9.23PCh. 9 - Prob. 9.24ACh. 9 - Prob. 9.25PCh. 9 - Prob. 9.26ACh. 9 - Prob. 9.27PCh. 9 - Prob. 9.28PCh. 9 - Prob. 9.29PCh. 9 - Prob. 9.30PCh. 9 - Prob. 9.31PCh. 9 - Prob. 9.32PCh. 9 - PROBLEM 9.33 A 12.0 gallon hold 39.9 kg of...Ch. 9 - A piece of dry ice (solid CO2) is placed inside a...Ch. 9 - Imagine a reaction that results in a change in...Ch. 9 - 9.32 Redraw the following diagram to represent the...Ch. 9 - 9.33 A reaction is carried out in a cylinder...Ch. 9 - Prob. 9.38CPCh. 9 - Prob. 9.39CPCh. 9 - Prob. 9.40CPCh. 9 - Prob. 9.41CPCh. 9 - Prob. 9.42CPCh. 9 - Prob. 9.43CPCh. 9 - What is the difference between heat and...Ch. 9 - What is internal energy?Ch. 9 - Prob. 9.46SPCh. 9 - Prob. 9.47SPCh. 9 - Which of the following are state functions, and...Ch. 9 - Prob. 9.49SPCh. 9 - Calculate the work done in joules by a chemical...Ch. 9 - The addition of H2 to C=C double bonds is an...Ch. 9 - Prob. 9.52SPCh. 9 - Prob. 9.53SPCh. 9 - 9.50 A reaction inside a cylindrical container...Ch. 9 - At a constant pressure of 0.905 atm, a chemical...Ch. 9 - RANWhen a sample of a hydrocarbon fuel is ignited...Ch. 9 - Used in welding metals, the reaction of acetylene...Ch. 9 - What is the difference between the internal energy...Ch. 9 - Prob. 9.59SPCh. 9 - The explosion of 2.00 mol of solid trinitrotoluene...Ch. 9 - The reaction between hydrogen and oxygen to yield...Ch. 9 - The enthalpy change for the reaction of 50.0 mL of...Ch. 9 - Assume that a particular reaction evolves 244 kJ...Ch. 9 - What is the enthalpy change ( H ) for a reaction...Ch. 9 - Prob. 9.65SPCh. 9 - Indicate the direction of heat transfer between...Ch. 9 - Indicate the direction of heat transfer between...Ch. 9 - The familiar "ether" used as an anesthetic agent...Ch. 9 - How much energy in kilojoules is required to...Ch. 9 - Aluminum metal reacts with chlorine with a...Ch. 9 - How much heat in kilojoules is evolved or absorbed...Ch. 9 - How much heat in kilojoules is evolved or absorbed...Ch. 9 - Nitromethane sometimes used as a fuel in drag...Ch. 9 - Prob. 9.74SPCh. 9 - How much heat in kilojoules is evolved or absorbed...Ch. 9 - Prob. 9.76SPCh. 9 - Prob. 9.77SPCh. 9 - Sodium metal is sometimes used as a cooling agent...Ch. 9 - Prob. 9.79SPCh. 9 - Assuming that Coca-Cola has the same specific heat...Ch. 9 - Calculate the amount of heat required to raise the...Ch. 9 - Instant cold packs used to treat athletic injuries...Ch. 9 - Instant hot packs contain a solid and a pouch of...Ch. 9 - When 1.045 g of CaO is added to 50.0 mL of water...Ch. 9 - When a solution containing 8.00 g of NaOH in 50.0...Ch. 9 - When 0.187 g of benzene, C6H6 , is burned in a...Ch. 9 - When 0.500 g of ethanol, C2H6O, is burned in a...Ch. 9 - When 1.50 g of magnesium metal is allowed to react...Ch. 9 - A 110.0 g piece of molybdenum metal is heated to...Ch. 9 - Citric acid has three dissociable hydrogens. When...Ch. 9 - Prob. 9.91SPCh. 9 - Prob. 9.92SPCh. 9 - Prob. 9.93SPCh. 9 - The industrial degreasing solvent methylene...Ch. 9 - Hess's law can be used to calculate reaction...Ch. 9 - Find H in kilojoules for the reaction of nitric...Ch. 9 - Set up a Hess's law cycle, and use the following...Ch. 9 - Prob. 9.98SPCh. 9 - Prob. 9.99SPCh. 9 - What phase of matter is associated with the...Ch. 9 - What is the phase of the standard states of the...Ch. 9 - Write balanced equations for the formation of the...Ch. 9 - Prob. 9.103SPCh. 9 - Prob. 9.104SPCh. 9 - Prob. 9.105SPCh. 9 - The standard enthalpy change for the reaction of...Ch. 9 - Prob. 9.107SPCh. 9 - Styrene ( C8H8 ), the precursor of polystyrene...Ch. 9 - Prob. 9.109SPCh. 9 - Prob. 9.110SPCh. 9 - Prob. 9.111SPCh. 9 - Prob. 9.112SPCh. 9 - Prob. 9.113SPCh. 9 - Prob. 9.114SPCh. 9 - Prob. 9.115SPCh. 9 - Prob. 9.116SPCh. 9 - Isooctane, C8H18, is the component of gasoline...Ch. 9 - Calculate an approximate heat of combustion for...Ch. 9 - Use the data in Table 9.3 to calculate an...Ch. 9 - Use the average bond dissociation energies in...Ch. 9 - Use the bond dissociation energies in Table 9.3 to...Ch. 9 - Prob. 9.122SPCh. 9 - Prob. 9.123SPCh. 9 - Prob. 9.124SPCh. 9 - Prob. 9.125SPCh. 9 - Tell whether the entropy changes for the following...Ch. 9 - Prob. 9.127SPCh. 9 - Prob. 9.128SPCh. 9 - Prob. 9.129SPCh. 9 - Prob. 9.130SPCh. 9 - Prob. 9.131SPCh. 9 - Tell whether reactions with the following values...Ch. 9 - Tell whether reactions with the following values...Ch. 9 - Suppose that a reaction has H=33kJ and S=58J/K. At...Ch. 9 - Suppose that a reaction has H=+41kJ and S=27J/K....Ch. 9 - Which of the reactions (a)-(d) in Problem 9.132...Ch. 9 - Vinyl chloride (H2C=CHCI), the starting material...Ch. 9 - Ethyl alcohol has Hfusion=5.02kJ/mol and melts at...Ch. 9 - Chloroform has Hvaporization=29.2kJ/mol and boils...Ch. 9 - The boiling point of a substance is defined as the...Ch. 9 - What is the melting point of benzene in kelvin if...Ch. 9 - Prob. 9.142SPCh. 9 - Methanol (CH3OH) is made industrially in two steps...Ch. 9 - Ethyl chloride ( C2H5CI ), a substance used as a...Ch. 9 - Prob. 9.145MPCh. 9 - For a process to be spontaneous, the total entropy...Ch. 9 - Prob. 9.147MPCh. 9 - Prob. 9.148MPCh. 9 - Prob. 9.149MPCh. 9 - Prob. 9.150MPCh. 9 - Phosgene, COCI2(g), is a toxic gas used as an...Ch. 9 - Prob. 9.152MPCh. 9 - Write a balanced equation for the reaction of...Ch. 9 - Hydrazine, a component of rocket fuel, undergoes...Ch. 9 - Prob. 9.155MP
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