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Calculate the standard enthalpy of react...

Calculate the standard enthalpy of reaction for the following reaction using the listed enthalpies of reaction :
`3Co(s)+2O_(2)(g)rarrCo_(3)O_(4)(s)`
`2 Co(s)+O_(2)(g)rarr2CoO(s)," "DeltaH_(1)^(@)=-475.8 kJ`
`6CoO(s)+O_(2)(g)rarr2Co_(3)O_(4)(s),DeltaH_(2)^(@)=-355.0 kJ`

A

`-891.2 kJ`

B

`-120.8 kJ`

C

`+891.2 kJ`

D

`-830.8 kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaH^(@)=(3)/(2)xxDeltaH_(1)^(@)+(DeltaH_(2)^(@))/(2)`
`=-713.7 - 177.5`
`=-891.2 " kJ"`
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