Chemistry: Atoms First
2nd Edition
ISBN: 9780073511184
Author: Julia Burdge, Jason Overby Professor
Publisher: McGraw-Hill Education
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Chapter 10, Problem 10.4VC
Interpretation Introduction
Interpretation:
The variation in the results of the experiment has to be given if the reaction was endothermic.
Concept Introduction:
Calorimetry can be defined as the measurement of changes in heat.
Two types of Calorimetry are coffee cup calorimeter and bomb calorimeter.
The change in heat of the system can be determined with the value of the heat capacity of the calorimeter.
The heat capacity of the calorimeter can be given as,
Exothermic and Endothermic reactions:
Heat is flow of thermal energy involving two bodies at various temperatures. The flow of thermal energy involving two bodies at various temperatures is called as heat. The flow of heat implies that energy is either released or absorbed on describing about energy changes that takes place during a process.
Exothermic process is the chemical process in which heat is released to the surroundings.
Endothermic process is the chemical process in which heat is absorbed from the surroundings.
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Target Equation: (1) Mg(s) + 1/2 O2 (g) → MgO(s)Reactions: (2) MgO (s) + 2 HCl (aq) → MgCl2 (aq) + H2O (l) ΔH2 = ?(3) Mg (s) + 2 HCl (aq) → MgCl2 (aq) + H2 (g) ΔH3 = ?(4) H2 (g) + 1/2 O2 (g) → H2O (l) ΔH4 = -285.8 kJ
Reaction
Mass (grams) of MgO(s)
Mass (grams) of Mg(s)
Volume (mL) of HCl(aq)
Concentration of HCl (mol/L)
Initial Temp (°C)
Final Temp (°C)
2
0.40
n/a
50.0
1.00
21.5
26.5
3
n/a
0.25
50.0
1.00
22.5
34.0
Using the data above, determine the enthalphy change (ΔH) for reactions (2) and (3). List any assumptions you make.Reaction (2): MgO (s) + 2 HCl (aq) → MgCl2 (aq) + H2O (l)Reaction (3): Mg (s) + 2 HCl (aq) → MgCl2 (aq) + H2 (g)
Consider the combustion of a single molecule of CH4(g),forming H2O(l) as a product. (a) How much energy, in J,is produced during this reaction? (b) A typical X-ray lightsource has an energy of 8 keV (see inside back cover forconversion between eV and J). Is the energy released by thecombustion of a CH4 molecule larger or smaller than the energyof an X-ray from this source?
Which of the following reactions is most likely to be exothermic?(a) F2(g) → 2 F(g) (b) 2 Cl(g) → Cl2(g) (c) Cu(s) → Cu(l) (d) CBr4(g) → C(g) + 4 Br(g) (e) CO(g) → C(g) + O(g)
Chapter 10 Solutions
Chemistry: Atoms First
Ch. 10.1 - Prob. 10.1.1SRCh. 10.1 - Prob. 10.1.2SRCh. 10.1 - Prob. 10.1.3SRCh. 10.2 - Calculate the overall change in internal energy,...Ch. 10.2 - Calculate the change in total internal energy for...Ch. 10.2 - Calculate the magnitude of q for a system that...Ch. 10.2 - The diagram on the left shows a system before a...Ch. 10.2 - Prob. 10.2.1SRCh. 10.2 - Prob. 10.2.2SRCh. 10.3 - Determine the work done (in joules) when a sample...
Ch. 10.3 - Calculate the work done by or on the system during...Ch. 10.3 - (a) Against what external pressure must a gas...Ch. 10.3 - The diagram on the left shows a sample of gas...Ch. 10.3 - Given the thermochemical equation for...Ch. 10.3 - Calculate the solar energy required to produce...Ch. 10.3 - Prob. 3PPBCh. 10.3 - The diagrams represent systems before and after...Ch. 10.3 - Prob. 10.3.1SRCh. 10.3 - Prob. 10.3.2SRCh. 10.4 - Prob. 10.4WECh. 10.4 - Prob. 4PPACh. 10.4 - Prob. 4PPBCh. 10.4 - A metal pellet with a mass of 100.0 g. originally...Ch. 10.4 - What would the final temperature be if the pellet...Ch. 10.4 - Prob. 5PPBCh. 10.4 - Prob. 5PPCCh. 10.4 - A Famous Amos bite-sized chocolate chip cookie...Ch. 10.4 - A serving of Grape-Nuts cereal (5.80 g) is burned...Ch. 10.4 - Prob. 6PPBCh. 10.4 - Suppose an experiment to determine the energy...Ch. 10.4 - Prob. 10.4.1SRCh. 10.4 - Prob. 10.4.2SRCh. 10.4 - Prob. 10.4.3SRCh. 10.4 - Prob. 10.4.4SRCh. 10.5 - Given the following thermochemical equations....Ch. 10.5 - Use the thermochemical equations provided in...Ch. 10.5 - Prob. 10.5.1SRCh. 10.5 - Prob. 10.5.2SRCh. 10.6 - Prob. 10.8WECh. 10.6 - Using data from Appendix 2, calculate Hrn for...Ch. 10.6 - Prob. 8PPBCh. 10.6 - The diagrams represent a system before and after a...Ch. 10.6 - Given the following information, calculate the...Ch. 10.6 - Use the following data to calculate Hf for...Ch. 10.6 - Prob. 9PPBCh. 10.6 - The diagrams represent a system before and after a...Ch. 10.6 - Prob. 10.6.1SRCh. 10.6 - Prob. 10.6.2SRCh. 10.6 - Prob. 10.6.3SRCh. 10.7 - Use bond enthalpies from Table 10.4 to estimate...Ch. 10.7 - Use bond enthalpies from fable 10.4 to estimate...Ch. 10.7 - Prob. 10PPBCh. 10.7 - Prob. 10PPCCh. 10.7 - Prob. 10.7.1SRCh. 10.7 - Prob. 10.7.2SRCh. 10.7 - Prob. 10.7.3SRCh. 10.7 - Prob. 10.7.4SRCh. 10.8 - Prob. 10.11WECh. 10.8 - Prob. 11PPACh. 10.8 - The lattice energy of MgO is 3890 kJ/mol, and the...Ch. 10.8 - Prob. 11PPCCh. 10.8 - Prob. 10.8.1SRCh. 10.8 - Prob. 10.8.2SRCh. 10 - Define these terms: system, surroundings, thermal...Ch. 10 - What is heat? How does heat differ from thermal...Ch. 10 - Prob. 10.3QPCh. 10 - Define these terms: thermochemistry, exothermic...Ch. 10 - Prob. 10.5QPCh. 10 - Describe two exothermic processes and two...Ch. 10 - Decomposition reactions are usually endothermic,...Ch. 10 - On what law is the first law of thermodynamics...Ch. 10 - Explain what is meant by a state function. Give...Ch. 10 - Prob. 10.10QPCh. 10 - Prob. 10.11QPCh. 10 - Prob. 10.12QPCh. 10 - Prob. 10.13QPCh. 10 - Prob. 10.14QPCh. 10 - Prob. 10.15QPCh. 10 - Prob. 10.16QPCh. 10 - Define these terms: enthalpy and enthalpy of...Ch. 10 - Prob. 10.18QPCh. 10 - Prob. 10.19QPCh. 10 - Prob. 10.20QPCh. 10 - Prob. 10.21QPCh. 10 - A gas expands and does PV work on the surroundings...Ch. 10 - Prob. 10.23QPCh. 10 - Prob. 10.24QPCh. 10 - Consider the reaction at a certain temperature. If...Ch. 10 - Prob. 10.26QPCh. 10 - Prob. 10.27QPCh. 10 - Prob. 10.28QPCh. 10 - Prob. 10.1VCCh. 10 - Prob. 10.2VCCh. 10 - Prob. 10.3VCCh. 10 - Prob. 10.4VCCh. 10 - Prob. 10.5VCCh. 10 - Prob. 10.6VCCh. 10 - Prob. 10.7VCCh. 10 - Referring to the process depicted in Figure 10.10,...Ch. 10 - What is the difference between specific heat and...Ch. 10 - Define calorimetry and describe two commonly used...Ch. 10 - Prob. 10.31QPCh. 10 - Prob. 10.32QPCh. 10 - A sheet of gold weighing 10.0 g and at a...Ch. 10 - Prob. 10.34QPCh. 10 - A quantity of 2.00 102 mL of 0.862 M HC1 is mixed...Ch. 10 - Prob. 10.36QPCh. 10 - Prob. 10.37QPCh. 10 - Prob. 10.38QPCh. 10 - A 25.95-g sample of methanol at 35.6C is added to...Ch. 10 - Prob. 10.40QPCh. 10 - Prob. 10.41QPCh. 10 - Prob. 10.42QPCh. 10 - Prob. 10.43QPCh. 10 - Prob. 10.44QPCh. 10 - Prob. 10.45QPCh. 10 - Prob. 10.46QPCh. 10 - Prob. 10.47QPCh. 10 - Prob. 10.48QPCh. 10 - Prob. 10.49QPCh. 10 - Prob. 10.50QPCh. 10 - What is meant by the standard-state condition?Ch. 10 - How are the standard enthalpies of an element and...Ch. 10 - What is meant by the standard enthalpy of a...Ch. 10 - Write the equation for calculating the enthalpy of...Ch. 10 - Prob. 10.55QPCh. 10 - Prob. 10.56QPCh. 10 - Prob. 10.57QPCh. 10 - Calculate the heats of combustion for the...Ch. 10 - Calculate the heats of combustion for the...Ch. 10 - Prob. 10.60QPCh. 10 - Prob. 10.61QPCh. 10 - Prob. 10.62QPCh. 10 - From the standard enthalpies of formation,...Ch. 10 - Prob. 10.64QPCh. 10 - Prob. 10.65QPCh. 10 - Prob. 10.66QPCh. 10 - Which is the more negative quantity at 25C: Hf for...Ch. 10 - Prob. 10.68QPCh. 10 - Prob. 10.69QPCh. 10 - Prob. 10.70QPCh. 10 - Prob. 10.71QPCh. 10 - Prob. 10.72QPCh. 10 - Prob. 10.73QPCh. 10 - Prob. 10.74QPCh. 10 - Prob. 10.75QPCh. 10 - Prob. 10.76QPCh. 10 - For the reaction 2C2H6(g)+7O2(g)4CO2(g)+6H2O(g)...Ch. 10 - Prob. 10.78QPCh. 10 - Prob. 10.79QPCh. 10 - Prob. 10.9VCCh. 10 - Prob. 10.10VCCh. 10 - Prob. 10.11VCCh. 10 - Prob. 10.12VCCh. 10 - Explain how the lattice energy of an ionic...Ch. 10 - Specify which compound in each of the following...Ch. 10 - Prob. 10.82QPCh. 10 - Prob. 10.83QPCh. 10 - Prob. 10.84QPCh. 10 - Prob. 10.85QPCh. 10 - Prob. 10.86QPCh. 10 - Prob. 10.87QPCh. 10 - Hydrazine (N2H4) decomposes according to the...Ch. 10 - Prob. 10.89QPCh. 10 - Prob. 10.90QPCh. 10 - Prob. 10.91QPCh. 10 - Prob. 10.92QPCh. 10 - Prob. 10.93QPCh. 10 - Prob. 10.94QPCh. 10 - You are given the following data....Ch. 10 - Prob. 10.96QPCh. 10 - Prob. 10.97QPCh. 10 - Prob. 10.98QPCh. 10 - Prob. 10.99QPCh. 10 - Compare the heat produced by the complete...Ch. 10 - The so-called hydrogen economy is based on...Ch. 10 - Prob. 10.102QPCh. 10 - Prob. 10.103QPCh. 10 - Prob. 10.104QPCh. 10 - Prob. 10.105QPCh. 10 - Prob. 10.106QPCh. 10 - Prob. 10.107QPCh. 10 - Prob. 10.108QPCh. 10 - A certain gas initially at 0.050 L undergoes...Ch. 10 - Prob. 10.110QPCh. 10 - The first step in the industrial recovery of zinc...Ch. 10 - Calculate the standard enthalpy change for the...Ch. 10 - Portable hot packs are available for skiers and...Ch. 10 - Prob. 10.114QPCh. 10 - Prob. 10.115QPCh. 10 - Prob. 10.116QPCh. 10 - Prob. 10.117QPCh. 10 - Prob. 10.118QPCh. 10 - Prob. 10.119QPCh. 10 - Prob. 10.120QPCh. 10 - Prob. 10.121QPCh. 10 - Prob. 10.122QPCh. 10 - Prob. 10.123QPCh. 10 - Prob. 10.124QPCh. 10 - Prob. 10.125QPCh. 10 - Vinyl chloride (C2H3Cl) differs from ethylene...Ch. 10 - Prob. 10.127QPCh. 10 - Prob. 10.128QPCh. 10 - Prob. 10.129QPCh. 10 - Determine the standard enthalpy of formation of...Ch. 10 - Prob. 10.131QPCh. 10 - Prob. 10.132QPCh. 10 - Prob. 10.133QPCh. 10 - Prob. 10.134QPCh. 10 - Prob. 10.135QPCh. 10 - Prob. 10.136QPCh. 10 - Both glucose and fructose arc simple sugars with...Ch. 10 - About 6.0 1013 kg of CO2 is fixed (converted to...Ch. 10 - Experiments show that it takes 1656 kJ/mol to...Ch. 10 - From a thermochemical point of view, explain why a...Ch. 10 - Prob. 10.141QPCh. 10 - Prob. 10.142QPCh. 10 - Prob. 10.143QPCh. 10 - Prob. 10.144QPCh. 10 - Prob. 10.145QPCh. 10 - Prob. 10.146QPCh. 10 - Prob. 10.147QPCh. 10 - Prob. 10.148QPCh. 10 - A drivers manual states that the stopping distance...Ch. 10 - Prob. 10.150QPCh. 10 - Prob. 10.151QPCh. 10 - Prob. 10.152QPCh. 10 - When 1.034 g of naphthalene (C10H8), is burned in...Ch. 10 - Prob. 10.154QPCh. 10 - A gas company in Massachusetts charges 27 cents...Ch. 10 - Prob. 10.156QPCh. 10 - Prob. 10.157QPCh. 10 - According to information obtained from...Ch. 10 - Using data from Appendix 2, calculate the standard...Ch. 10 - Using data from Appendix 2, calculate the standard...Ch. 10 - Prob. 10.3KSPCh. 10 - Prob. 10.4KSP
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