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चुना पत्थर का चुना में परिवर्तन इस प्रकार है :---
`CaCO_3(s)toCaO(s)+CO_(2)(g)`
`298K ` ताप व् 1 बार दाब पर `DeltaH^@` व् `DeltaS^@` के मान क्रमशः +179.1 किलजूल मोल`""^-1 ` तथा 160.2 जूल/केल्विन है यह मानकर किस ताप के साथ `DeltaH^@` व् `DeltaS^@` नहीं बदलते, किस ताप से ऊपर जाने पर चुना पत्थर, सवतः चुने बदलने लगेगा ?
A. `1008 K`
B. `1200 K`
C. `854 K`
D. `1118 K `

1 Answer

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Correct Answer - D
`DeltaS=(DeltaH)/T`
`DeltaS=160.2` जूल/K, `DeltaH=179.1 xx 10^(3)` जूल/मोल
`T=(179.2xx10^(3))/(160.2)=1117.9 K `` 1118 K`

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