(a)
Interpretation:
For the given reaction, the value of
(a)
Explanation of Solution
The given reaction as follows,
The value of
Therefore, value of
The value of
Therefore, value of
The value of the Gibbs free energy change
Therefore, value of
From the obtained values the sign of enthalpy is negative, entropy is negative and the Gibbs free energy is negative. For the reaction to be spontaneous, here both
(b)
Interpretation:
For the given reaction, the value of
(b)
Explanation of Solution
The given reaction as follows,
The value of
Therefore, value of
The value of
Therefore, value of
The value of the Gibbs free energy change
Therefore, value of
From the obtained values the sign of enthalpy is negative, entropy is positive and the Gibbs free energy is negative. For the spontaneous reaction, the sign of both
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Chapter 17 Solutions
Chemistry: Principles and Practice
- Calculate G at 355 K for each of the reactions in Question 17. State whether the reactions are spontaneous.arrow_forwardUse the data in Appendix G to calculate the standard entropy change for H2(g) + CuO(s) H2O() + Cu(s)arrow_forwardCalculate G for the following reactions and state whether each reaction is spontaneous under standard conditions at 298 K. (a) 2Na(s) + H2SO4() Na2SO4(s) + H2(g) (b) Cu(s) + H2SO4() CuSO4(s) + H2(g)arrow_forward
- From the values for G f given in Appendix 1, calculate G at 25C for each of the reactions in Question 19.arrow_forwardOn the basis of your experience, predict which reactions are spontaneous: (a) PbO2(s)Pb(s)+O2(g)(b) N2(l)N2(g) at 25C (c) C6H12O6(s)C6H12O6(l) at 25C (d) Ca2+(aq)+CO32(aq)CaCO3(s)arrow_forwardActually, the carbon in CO2(g) is thermodynamically unstable with respect to the carbon in calcium carbonate(limestone). Verify this by determining the standardGibbs free energy change for the reaction of lime,CaO(s), with CO2(g) to make CaCO3(s).arrow_forward
- Calculate E°, G°, and K at 25°C for the reaction 3Mn2+(aq)+2MnO4(aq)+2H2O5MnO2(s)+4H+(aq)arrow_forwardCalculate E°, G°, and K at 25°C for the reaction 3MnO4(aq)+4H+(aq)+Cl2(g)2Mn2+(aq)+2ClO3(aq)+2H2Oarrow_forwardWhat is the sign of the standard Gibbs free-energy change at low temperatures and at high temperatures for the explosive decomposition of TNT? Use your knowledge of TNT and the chemical equation, particularly the phases, to answer this question. (Thermodynamic data for TNT are not in Appendix G.) 2C7H5N3O6(s) 3N2(g) + 5H2O() + 7C(s) + 7CO(g)arrow_forward
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