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Metallic mercury is obtained by roasting mercury (II) sulphide in a limited amount of air. Estimate the temperature range in which the standard reaction is product-facoured. HgS(s)+O_(2)(g) to Hg(l)+SO_(2)(g) DeltaH^(0)=-238.6 kJ/"mole" and DeltaS^(0)=+36.7 J/"mole".K. |
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Answer» SOLUTION :Assume that `DeltaH` and `DeltaS` VALUES do not depend on temperature . As `DeltaH^(@)` is negative and `DeltaS^(@)` is positive using the equation `DeltaG^(@)=DeltaH^(@)=TDELTAS^(@)` `DeltaG^(@)` will be negative at all temperatures and so the reaction is product-favoured at all temperatures. Inn this problem, both the factors `DeltaH^(@)` and `DeltaS^(@)` are favourable to SPONTANEITY. |
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