Homework Answers
(a) Entropy is decreased.
Entropy is the measure of disorderness. While going from left to
right in the above equation, the disorderness has been decreased
and hence is entropy.
(b)
S0r
= 2 * S0f
(H2O) - 2 * S0f
(H2) - S0f
(O2)
= 2 ( 69.95 ) - 2 ( 130.7 ) - ( 205.1)
= - 326.6 J / K
Add Answer to:
You can make predictions about entropy of shown below ) ?? and AS by com paring...
Entropy/Enthalpy Questions 2. Consider the reaction: 2 BsHo (I)+ 12 O: (8) (a) Use the standard...
Entropy/Enthalpy Questions
2. Consider the reaction: 2 BsHo (I)+ 12 O: (8) (a) Use the standard enthalpies of formation found in Appendix B of the textbook to calculate the enthalpy change of the reaction. The standard enthalpy of formation of BsH, () is 73.2 kl/mol. 5 B0, (s) + 9 HiO () s(-1272) 9-235.84)-273.2)-2(0) [-8932.56-146.47 40 78.46 (b) Predict the sign of the entropy change and provide the two reasons likely to have made the biggest impact on the entropy...
Consider the reaction: 2 BsHs (I)12 02 (g) (a) Use the standard enthalpies of formation found...
Consider the reaction: 2 BsHs (I)12 02 (g) (a) Use the standard enthalpies of formation found in Appendix B of the textbook to calculate the enthalpy change of the reaction. The standard enthalpy of formation of BsH, (I) is 73.2 kl/mol. 5 B2Os (s) +9 H2O (I) (b) Predict the sign of the entropy change and provide the two reasons likely to have made the biggest impact on the entropy change (and upon which you based your prediction). (c) Based...
Calculate the standard entropies for the following chemical reactions. Sulfur S(s, rhombic) 31.88 430.9 S818) 49.7...
Calculate the standard entropies for the following chemical
reactions.
Sulfur S(s, rhombic) 31.88 430.9 S818) 49.7 -300.4 SO2(8) SO;(8) SO2 (aq) 102.3 - 296.9 -395.2 -909.3 -370.4 -744.5 248.5 256.2 20.1 217.94 203.26 114.60 Hydrogen Hg) H(aq) H*(8) H2(8) 0 1536.2 1517.0 108.9 130.58 Iodine I(8) 1 (8) 106.60 -55.19 62.25 70.16 -51.57 19.37 12(8) 12(8) HI(g) 180.66 111.3 260.57 116.73 206.3 25.94 1.30 Entropy changes for a reaction can be estimated in a manner analogous to that by which...
Chapter 5 and Chapter 10 Problem solving (please practice the following questions and make sure that you understand...
Chapter 5 and Chapter 10 Problem solving (please practice the following questions and make sure that you understand the principles behind: you can find Ar from textbook or website I. A 145 g sample of copper metal at 100.0°C is placed into 250.0 g of water at 25.0°C in a calorimeter. When the system reaches thermal equilibrium, the temperature of the water in the calorimeter is 28.8°C. Assume the calorimeter is perfectly insulated. What is the specific heat capacity of...
I wasn't given the partial pressures so why do you need it? can the problem really not be solved without it? 1 ba...
I
wasn't given the partial pressures so why do you need it? can the
problem really not be solved without it?
1
bar for each
4. (11.11) The combustion of hydrogen is a reaction that is known to "go to completion." a. Use data in Appendix H to evaluate the thermodynamic equilibrium constant at 298.15 K for the reaction H2(g) + {O2(g) → H2O(1) b. Assume that the reaction is at equilibrium at 298.15 K in a system in which...
4. Only ideal processes can be thermodynamically "reversible." Why can rear proce y can real process...
4. Only ideal processes can be thermodynamically "reversible." Why can rear proce y can real processes not be? 5. Consider the following reactions. (Note: if this were an exam we would give you an excerpt on tabular data from Appendix 4 (Table A4.3). 2Fe(s) + 3Cla(s) 2FeCl(s) N2H4(8) + H2(g) + 2NH3(g) (a) Would you expect the entropy change for the above reaction to be >0, <0, or no (small)? Justify your answer. (d) Would you expect the entropy change...
Entropy/Enthalpy Questions
2. Consider the reaction: 2 BsHo (I)+ 12 O: (8) (a) Use the standard enthalpies of formation found in Appendix B of the textbook to calculate the enthalpy change of the reaction. The standard enthalpy of formation of BsH, () is 73.2 kl/mol. 5 B0, (s) + 9 HiO () s(-1272) 9-235.84)-273.2)-2(0) [-8932.56-146.47 40 78.46 (b) Predict the sign of the entropy change and provide the two reasons likely to have made the biggest impact on the entropy...
Consider the reaction: 2 BsHs (I)12 02 (g) (a) Use the standard enthalpies of formation found in Appendix B of the textbook to calculate the enthalpy change of the reaction. The standard enthalpy of formation of BsH, (I) is 73.2 kl/mol. 5 B2Os (s) +9 H2O (I) (b) Predict the sign of the entropy change and provide the two reasons likely to have made the biggest impact on the entropy change (and upon which you based your prediction). (c) Based...
Calculate the standard entropies for the following chemical
reactions.
Sulfur S(s, rhombic) 31.88 430.9 S818) 49.7 -300.4 SO2(8) SO;(8) SO2 (aq) 102.3 - 296.9 -395.2 -909.3 -370.4 -744.5 248.5 256.2 20.1 217.94 203.26 114.60 Hydrogen Hg) H(aq) H*(8) H2(8) 0 1536.2 1517.0 108.9 130.58 Iodine I(8) 1 (8) 106.60 -55.19 62.25 70.16 -51.57 19.37 12(8) 12(8) HI(g) 180.66 111.3 260.57 116.73 206.3 25.94 1.30 Entropy changes for a reaction can be estimated in a manner analogous to that by which...
Chapter 5 and Chapter 10 Problem solving (please practice the following questions and make sure that you understand the principles behind: you can find Ar from textbook or website I. A 145 g sample of copper metal at 100.0°C is placed into 250.0 g of water at 25.0°C in a calorimeter. When the system reaches thermal equilibrium, the temperature of the water in the calorimeter is 28.8°C. Assume the calorimeter is perfectly insulated. What is the specific heat capacity of...
I
wasn't given the partial pressures so why do you need it? can the
problem really not be solved without it?
1
bar for each
4. (11.11) The combustion of hydrogen is a reaction that is known to "go to completion." a. Use data in Appendix H to evaluate the thermodynamic equilibrium constant at 298.15 K for the reaction H2(g) + {O2(g) → H2O(1) b. Assume that the reaction is at equilibrium at 298.15 K in a system in which...
4. Only ideal processes can be thermodynamically "reversible." Why can rear proce y can real processes not be? 5. Consider the following reactions. (Note: if this were an exam we would give you an excerpt on tabular data from Appendix 4 (Table A4.3). 2Fe(s) + 3Cla(s) 2FeCl(s) N2H4(8) + H2(g) + 2NH3(g) (a) Would you expect the entropy change for the above reaction to be >0, <0, or no (small)? Justify your answer. (d) Would you expect the entropy change...
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