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  4. For the dissociation of limestone in the slag zone of the blast furnace, the reaction is

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Q. For the dissociation of limestone in the slag zone of the blast furnace, the reaction is

COMEDKCOMEDK 2012General Principles and Processes of Isolation of Elements

Solution:

Dissociation of limestone in the slag zone of the blast furnace is represented as
$ CaCO_{3(s)} \xrightarrow{\Delta} CaO_{(s)} + CO_{2(g)}$
The reaction proceeds with absorption of heat and leads to increase in entropy due to formation of $CO_2$ gas.