EXOTHERMIC: A + B Rewrite : A + B = C + D -AH value (heat is lost from the syste

Question

EXOTHERMIC: A + B Rewrite : A + B = C + D -AH value (heat is lost from the system C + D heat heat is a product) Exercise 1.3 U'sing Le Chatelier's Principle I Arsenic can be extracted from its ores by first reacting the ore with oxygen (called roastng) to form solid As,0s, which is then reduced using carbon: Predict the direction of the shift of the equilibrium position in response to each of the following changes in conditions. a. Addition of carbon monoxide b. Addition or removal of carbon or tetraarsenic hexoxide (As40s) c. Removal of gaseous arsenic (As)

Explanation / Answer

(I)using le chateliar principle , addition of carbon monoxide will lead to back reaction as the concentration will increase on right side of reaction hence the direction of reaction reverses according to above law (II) as both of them are in solid state any change in concentration will not change the rate of reaction (iii) remopval of As4 will lead to formation of more As4 hence reaction will go in forward direction

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