Chemistry, Books a la Carte Plus Mastering Chemistry with eText -- Access Card Package (7th Edition)
Chemistry, Books a la Carte Plus Mastering Chemistry with eText -- Access Card Package (7th Edition)
7th Edition
ISBN: 9780133900811
Author: John E. McMurry, Robert C. Fay, Jill Kirsten Robinson
Publisher: PEARSON
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Chapter 9, Problem 9.1P
Interpretation Introduction

Interpretation:

The amount of work done should be calculated with the direction and sign of the flow of work energy.

Concept introduction:

During any reaction, work done is calculated with the help of following formula:

W=PΔV

Where, W= work done, P= external pressure and ΔV=VfinalVinitial= change in volume.

By convention, when work is done on the system the sign is positive.

When work is done by the system the sign is negative.

If energy enters into the system then the sign is positive and if the energy leaves the system then the sign is negative.

Expert Solution & Answer
Check Mark

Answer to Problem 9.1P

Solution:Work done is 19.166 kJ.

Since, the contraction of volume occurs so the sign of work done is positive and the work energy flows into the system as per convention.

Given:

Initial volume = 8.6 L

Final volume =4.3 L

External pressure= 44atm

Explanation of Solution

Here, since the volume contract so, change in volume is calculated as: ΔV=4.3 L8.6 L=4.3 L

Work done is calculated as:

W=PΔV=44 atm×(4.3L)=189.2 Latm

Now convert L atm into kJ with the following conversion:

1 Latm=101.3 J189.2 Latm=101.3 J1 Latm×189.2 Latm=19165.96 J=19.16596 kJ19.166 kJ

Since, the contraction of volume occurs so the work is done on the system and sign of work done is positive. The work energy flows into the system as per convention.

Conclusion

Work done is 19.166 kJ. Sign of work done is positive and the work energy flows into the system as per convention.

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Chapter 9 Solutions

Chemistry, Books a la Carte Plus Mastering Chemistry with eText -- Access Card Package (7th Edition)

Ch. 9 - PRACTICE 9.11 When 25.0 mL of 1.0 M H2SO4 is added...Ch. 9 - Prob. 9.12ACh. 9 - Prob. 9.13PCh. 9 - Prob. 9.14ACh. 9 - Prob. 9.15PCh. 9 - Prob. 9.16ACh. 9 - Prob. 9.17PCh. 9 - APPLY 9.18 Benzene (C6H6) has two resonance...Ch. 9 - Prob. 9.19PCh. 9 - Prob. 9.20ACh. 9 - Prob. 9.21PCh. 9 - Prob. 9.22ACh. 9 - Prob. 9.23PCh. 9 - Prob. 9.24ACh. 9 - Prob. 9.25PCh. 9 - Prob. 9.26PCh. 9 - Prob. 9.27PCh. 9 - Prob. 9.28PCh. 9 - Prob. 9.29PCh. 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. 9.34CPCh. 9 - Prob. 9.35CPCh. 9 - Prob. 9.36CPCh. 9 - Prob. 9.37CPCh. 9 - Prob. 9.38CPCh. 9 - Prob. 9.39CPCh. 9 - What is the difference between heat and...Ch. 9 - What is internal energy?Ch. 9 - Prob. 9.42SPCh. 9 - Prob. 9.43SPCh. 9 - Which of the following are state functions, and...Ch. 9 - Prob. 9.45SPCh. 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. 9.48SPCh. 9 - Prob. 9.49SPCh. 9 - 9.50 A reaction inside a cylindrical container...Ch. 9 - At a constant pressure of 0.905 atm, a chemical...Ch. 9 - Prob. 9.52SPCh. 9 - Prob. 9.53SPCh. 9 - Prob. 9.54SPCh. 9 - Prob. 9.55SPCh. 9 - 9.56 The explosion of 2.00 mol of solid...Ch. 9 - Prob. 9.57SPCh. 9 - Prob. 9.58SPCh. 9 - Assume that a particular reaction evolves 244 kJ...Ch. 9 - Prob. 9.60SPCh. 9 - A reaction takes place at a constant pressure of...Ch. 9 - Prob. 9.62SPCh. 9 - Indicate the direction of heat transfer between...Ch. 9 - Prob. 9.64SPCh. 9 - Prob. 9.65SPCh. 9 - Aluminum metal reacts with chlorine with a...Ch. 9 - Prob. 9.67SPCh. 9 - 9,68 How much heat in kilojoules is evolved or...Ch. 9 - 9.69 Nitromethane (CH3NO2), sometimes used as 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 - What is the difference between heat capacity and...Ch. 9 - Does a measurement carried out in a bomb...Ch. 9 - Sodium metal is sometimes used as a cooling agent...Ch. 9 - Titanium metal is used as a structural material in...Ch. 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 - 9.79 Instant hot packs contain a solid and a pouch...Ch. 9 - Prob. 9.80SPCh. 9 - Prob. 9.81SPCh. 9 - 9.82 When 0.187 g of benzene, C6H6 is burned in a...Ch. 9 - Prob. 9.83SPCh. 9 - 9.84 How is the standard state of an element...Ch. 9 - Prob. 9.85SPCh. 9 - Prob. 9.86SPCh. 9 - Prob. 9.87SPCh. 9 - Prob. 9.88SPCh. 9 - Prob. 9.89SPCh. 9 - Prob. 9.90SPCh. 9 - Prob. 9.91SPCh. 9 - Write balanced equations for the formation of the...Ch. 9 - Prob. 9.93SPCh. 9 - Prob. 9.94SPCh. 9 - Prob. 9.95SPCh. 9 - Prob. 9.96SPCh. 9 - Prob. 9.97SPCh. 9 - Prob. 9.98SPCh. 9 - Prob. 9.99SPCh. 9 - Prob. 9.100SPCh. 9 - Prob. 9.101SPCh. 9 - Prob. 9.102SPCh. 9 - Prob. 9.103SPCh. 9 - Prob. 9.104SPCh. 9 - Prob. 9.105SPCh. 9 - Prob. 9.106SPCh. 9 - Prob. 9.107SPCh. 9 - Use the average bond dissociation energies in...Ch. 9 - 9.109 Use the bond dissociation energies in Table...Ch. 9 - Prob. 9.110SPCh. 9 - Calculate an approximate heat of combustion for...Ch. 9 - Prob. 9.112SPCh. 9 - Prob. 9.113SPCh. 9 - Prob. 9.114SPCh. 9 - Prob. 9.115SPCh. 9 - Prob. 9.116SPCh. 9 - Prob. 9.117SPCh. 9 - Prob. 9.118SPCh. 9 - Prob. 9.119SPCh. 9 - One of the steps in the cracking of petroleum into...Ch. 9 - The commercial production of 1,2-dichloro ethane,...Ch. 9 - Prob. 9.122SPCh. 9 - Prob. 9.123SPCh. 9 - Suppose that a reaction has H = -33 kJ and S = -58...Ch. 9 - Suppose that a reaction has H = +41 kJ and S =...Ch. 9 - Prob. 9.126SPCh. 9 - Vinyl chloride (H2C=CHCl), the starting material...Ch. 9 - Ethyl alcohol has Hfusion = 5.02 kJ/mol and melts...Ch. 9 - Chloroform has Hvaporization = 29.2 kJ/mol and...Ch. 9 - When a sample of a hydrocarbon fuel is ignited and...Ch. 9 - Used in welding metals, the reaction of acetylene...Ch. 9 - Ethyl chloride (C2H5Cl), a substance used as a...Ch. 9 - When 1.50 g of magnesium metal is allowed to react...Ch. 9 - Prob. 9.134CPCh. 9 - Find H in kilojoules for the reaction of nitric...Ch. 9 - The boiling point of a substance is defined as the...Ch. 9 - Prob. 9.137CPCh. 9 - Prob. 9.138CPCh. 9 - Prob. 9.139CPCh. 9 - Isooctane, C8H18, is the component of gasoline...Ch. 9 - We said in Section 9.1 that the potential energy...Ch. 9 - For a process to be spontaneous, the total entropy...Ch. 9 - Set up a Hess's law cycle, and use the following...Ch. 9 - A 110.0 g piece of molybdenum metal is heated to...Ch. 9 - Given 400.0 g of hot tea at 80.0 °C, what mass of...Ch. 9 - Citric acid has three dissociable hydrogens. When...Ch. 9 - Assume that 100.0 mL of 0.200 M CsOH and 50.0 mL...Ch. 9 - Imagine that you dissolve 10.0 g of a mixture of...Ch. 9 - Consider the reaction: 4CO(g)+2NO2(g)4CO2(g)+N2(g)...Ch. 9 - The reaction S8(g)4S2(g) has H = +237 kJ (a) The...Ch. 9 - Prob. 9.151MPCh. 9 - Prob. 9.152MPCh. 9 - (a) Write a balanced equation for the reaction of...Ch. 9 - Prob. 9.154MPCh. 9 - Prob. 9.155MP
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