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Fe(2)O(3)(s) +(3)/(2)C(s) to (3)/(2)CO(2...

`Fe_(2)O_(3)(s) +(3)/(2)C(s) to (3)/(2)CO_(2)(g) +2Fe(s), DeltaH^(@)= +234.1kJ`
`C(s)+ O_(2)(g) to CO_(2)(g), DeltaH^(@)= -393.5kJ`
निम्न अभिक्रिया के लिए `DeltaH^(@)` की गणना करने के लिए इन समीकरणों और `DeltaH^(@)` मानों का उपयोग कीजिए।
`4Fe(s) +3O_(2)(g) to 2Fe_(2)O_(3)(s)`

A

`-1648.7kJ`

B

`-1255.3kJ`

C

`-1021.2kJ`

D

`-129.4kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`2Fe(s)+(3)/(2)CO_(2)(g) to Fe_(2)O_(3)(s) +(3)/(2)C(s), DeltaH^(@)= -234.1kJ" " ....(i)`
`C(s) +O_(2)(g) to CO_(2)(g)(DeltaH^(@)=-393.5kJ)...(ii)`
समीकरण (i) को 2 से और समीकरण (ii) को 3 से गुणा करने पर और दोनों समीकरणों को जोड़ने पर, हमें प्राप्त होता है,
`4Fe(s) +3O_(2)(g) to 2Fe_(2)O_(3)(s), DeltaH^(@)`
`=(-234.1xx2)+ (-3xx393.5)`
`=-1648.7kJ`
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