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Given ehthapy of formation of CO2(g) and...

Given ehthapy of formation of `CO_2(g) and CaO(s)` are -94.0 kJ and -152 kJ respectively and the enthalpy of formation `CaCO_3(s)` is

A

`-42 kJ`

B

`-202 kJ`

C

`+ 202 kJ`

D

`-288 kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
`C+O_2 rarr CO_2(g),Delta H =-94.0 kj ….(i)`
`Ca+1/2 O_2 rarr CaO(s), Delta H= -152 kJ …(ii) `
`CaCO_3(s) rarr CaO(s)+CO_2(g), Delta H =-288 kJ `
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NIKITA PUBLICATION-Chemical Thermodynamics & Energetics-QUESTION FROM COMPETITIVE EXAM
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