(a)
Interpretation:
The temperature at which each decomposition is spontaneous has to be calculated.
Concept Introduction:
Free energy,
(a)
Explanation of Solution
The change in enthalpy and entropy of decomposition of calcium carbonate are calculated as,
When the reaction is spontaneous, the standard free energy is zero. The temperature at which decomposition occurs is calculated as,
The change in enthalpy and entropy of decomposition of magnesium carbonate are calculated as,
When the reaction is spontaneous, the standard free energy is zero. The temperature at which decomposition occurs is calculated as,
(b)
Interpretation:
The mass of limestone used to make slag has to be calculated.
(b)
Explanation of Solution
The mass of calcium carbonate is calculated as,
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