(a)
Interpretation:
The entropy change (
Concept introduction:
Entropy is defined as the ratio of thermal energy to the temperature which is unavailable for work done. It is also defined as the measure of disorder of molecule of a system. It is an extensive property and state function.
Entropy is related with the number of microstates for a system and microstate is defined as the number of ways for the system to be arranged.
The standard entropy change at room temperature is equal to the difference between the standard entropy of reactant and standard entropy of product.
Answer to Problem 21QAP
Explanation of Solution
Given process is:
The mathematical expression for the standard entropy value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
The value of standard entropy for
The value of standard entropy for
The value of standard entropy for
The value of standard entropy for
Put the values, we get:
(b)
Interpretation:
The entropy change (
Concept introduction:
Entropy is defined as the ratio of thermal energy to the temperature which is unavailable for work done. It is also defined as the measure of disorder of molecule of a system. It is an extensive property and state function.
Entropy is related with the number of microstates for a system and microstate is defined as the number of ways for the system to be arranged.
The standard entropy change at room temperature is equal to the difference between the standard entropy of reactant and standard entropy of product.
Answer to Problem 21QAP
Explanation of Solution
Given process is:
The mathematical expression for the standard entropy value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
The value of standard entropy for
The value of standard entropy for
The value of standard entropy for
The value of standard entropy for
Put the values, we get:
(c)
Interpretation:
The entropy change (
Concept introduction:
Entropy is defined as the ratio of thermal energy to the temperature which is unavailable for work done. It is also defined as the measure of disorder of molecule of a system. It is an extensive property and state function.
Entropy is related with the number of microstates for a system and microstate is defined as the number of ways for the system to be arranged.
The standard entropy change at room temperature is equal to the difference between the standard entropy of reactant and standard entropy of product.
Answer to Problem 21QAP
Explanation of Solution
Given process is:
The mathematical expression for the standard entropy value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
The value of standard entropy for
The value of standard entropy for
The value of standard entropy for
The value of standard entropy for
Put the values, we get:
(d)
Interpretation:
The entropy change (
Concept introduction:
Entropy is defined as the ratio of thermal energy to the temperature which is unavailable for work done. It is also defined as the measure of disorder of molecule of a system. It is an extensive property and state function.
Entropy is related with the number of microstates for a system and microstate is defined as the number of ways for the system to be arranged.
The standard entropy change at room temperature is equal to the difference between the standard entropy of reactant and standard entropy of product.
Answer to Problem 21QAP
Explanation of Solution
Given process is:
The mathematical expression for the standard entropy value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
The value of standard entropy for
The value of standard entropy for
The value of standard entropy for
Put the values, we get:
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Chapter 16 Solutions
EBK CHEMISTRY: PRINCIPLES AND REACTIONS
- Discuss the effect of temperature change on the spontaneity of the following reactions at 1 atm: (a) Al2O3(s)+2Fe(s)2Al(s)+Fe2O3(s) H =851.4kJ;S =38.5J/K (b) N2H4(l)N2+2H2(g) H =50.6kJ;S =0.3315kJ/K (c) SO3(g)SO2(g)+12 O2(g) H =98.9kJ;S =0.0939kJ/Karrow_forwardConsider the decomposition of red mercury(II) oxide under standard state conditions.. 2HgO(s,red)2Hg(l)+O2(g) (a) Is the decomposition spontaneous under standard state conditions? (b) Above what temperature does the reaction become spontaneous?arrow_forwardCalculate G at 355 K for each of the reactions in Question 17. State whether the reactions are spontaneous.arrow_forward
- Without doing any calculations, predict the sign of rS for the following reaction: Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g) (a) rS 0 (b) rS = 0 (c) rS 0arrow_forwardWhat is a spontaneous reaction?arrow_forwardElemental boron, in the form of thin fibers, can be made by reducing a boron halide with H2. BCl3(g) + 3/2 H2(g) B(s) + 3HCl(g) Calculate H, S, and G at 25 C for this reaction. Is the reaction predicted to be product favored at equilibrium at 25 C? If so, is it enthalpy driven or entropy driven?arrow_forward
- a Calculate K1, at 25C for sulfurous acid: H2SO3(aq)H+(aq)+HSO3(aq) b Which thermodynamic factor is the most significant in accounting for the fact that sulfurous acid is a weak acid? Why?arrow_forwardUse the data in Appendix J to calculate rG andKPat 25 C for the reaction 2HBr(g)+Cl2(g)2HCl(g)+Br2() Comment on the connection between the sign of rG and the magnitude ofKP.arrow_forwardIs the following reaction spontaneous as written? Explain. Do whatever calculation is needed to answer the question. SO2(g)+H2(g)H2S(g)+O2(g)arrow_forward
- Which contains greater entropy, a quantity of frozen benzene or the same quantity of liquid benzene at the same temperature? Explain in terms of the dispersal of energy in the substance.arrow_forwardUse S values to calculate the standard entropy change, rS0, for each of the following processes and comment on the sign of the change. (a) KOH(s) KOH(aq) (b) Na(g) Na(s) (c) Br2() Br2(g) (d) HCl(g) HCl(aq)arrow_forwardChemists and engineers who design nuclear power plants have to worry about high-temperature reactions because it is possible for water to decompose. (a) Under what conditions does this reaction occur spontaneously? 2H2O(g) 2H2(g) + O2(g) (b) Under conditions where the decomposition of water is spontaneous, do nuclear engineers have to worry about an oxygen/hydrogen explosion? Justify your answer.arrow_forward
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