1.

C_((s))+O_(2(g)) rarr CO_(2(g)) Calculate the standard entropy chage for the above reaction. Given the standard entropies of CO_(2(g)), C_((s)),O_(2(g))are 213.6, 5.740 and 205 JK^(-1) respectively (ii) Identify the compound (A) and (B) . R-C-=N overset(H_2O//H^+) rarr (A) overset(H_2O//H^+) rarr (B)

Answer»

Solution :`C(G) + O_(2) rarr CO_(2) (g)`
`Delta S_(R)^(0) = Sigma S_("products")^(0) - Sigma S_("REACTIONS")^(0)`
`Delta S_(r)^(0)={S_(CO_2)^(0)}-{S_(C)^(0)+S_(O_2)^(0)}`
`Delta S_(r)^(0)=213.6 - [5.74 + 205]`
`Delta S_(r)^(0)=213.6 - [210.74]`
`Delta S_(r)^(0)=286 K^(-1)`
(ii) `R-C -= N overset (H_2"O"//H^+)rarr underset("(Amide)(A)")R-CONH_(2) overset(H_2"O"//H^+)rarr underset("(Acid)(B)")(R-COOH)`


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