Calculate ΔStot when two iron blocks, each of mass 10.0 kg, one at 100 °C and the other at 25 °C, are placed in contact in an isolated container and allowed to come to equilibrium. The specific heat capacity of iron is 0.449 J K−1 g−1 and may be assumed constant over the temperature range involved. Comment on the sign of ΔStot.

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Q: At what temperatures will a reaction be spontaneous if ΔrH° = +62.4 kJ and ΔrS° = +301 J/K?

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A: B) The reaction is entropy driven.

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Q: Explain how the entropy of a system is related to the number ofpossible microstates?

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Q: Which one of the following is not equal to zero?   A.  Standard molar entropy of a perfect crystal…

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Q: Consider a process in which the entropy of a system increases by 105 J K−1 and the entropy of the…

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Q: What is the significance of the change in Gibbs free energy (∆G)for a reaction?

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