Ice at –5ºC is heated to become vapour with temperature of 110ºC at atmospheric pressure. The entropy change associated with this process can be obtained from (A) K K m , p dT C + f m T fusion , H + b

Question

Ice at –5ºC is heated to become vapour with temperature of 110ºC at atmospheric pressure. The entropy change associated with this process can be obtained from

(A) K K m , p dT C + f m T fusion , H + b m T on vaporisati , H + K K m , p dT C + K K m , p dT C
(B) K K m , p dT T C + f m T fusion , H + b m T on vaporisati , H + K K m , p T dT C + K K m , p T dT C
(C) K K p dT C + T qrev
(D) K K p dT C + Hmelting + Hboiling

Prashant Kotian · Accepted Answer

Correct answer: B. S = ? H2O(s) Ice –5ºC H2O(g) 110ºC Solid H2O(s) 268 K () H2O(s) 273 K  Fusion () H2O() 273 K Liq. () H2O() 373 K  Vaporisation (V) H2O(g) 373 K gas (V)  H2O(g) 383 K STotal = S + S +S +SV +SV =  K K m , p dT T C + f m T fusion , H  +  K K m , p T dT C + b m T on vaporisati , H  +  K K m , p T dT C

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