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The standard entropies of CO(2(g)), C((s...

The standard entropies of `CO_(2(g)), C_((s)), and O_(2(g))` are 213.5, 5.740 and 205 `JK^-1` respectively. The standard entropy of formation of `CO_2` is _________.

Text Solution

Verified by Experts

The correct Answer is:
2.76
Given:
`DeltaS_(CO_(2))^(@) = 213 JK^(-1)`
`DeltaS_(C(s))^(@) = 5.74 JK^(-1)`,
`DeltaS_(O_(2))^(@) = 205 JK^(-1)`
`C(s) + O_(2)(g) to CO_(2)(g)`
Standard entropy of formation of `CO_(2)` (g)
`=DeltaS_(CO_(2))^(@)-[DeltaS_(C(s))^(@) + DeltaS_(O_(2))^(@)]`
`=2.76 JK^(-1)`
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