The △ S for the reaction: 2H2 +O2 =2H2O at 300k when SH2=126.6, SO2=201.20, SH2O=68.0JKmol respectively

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△ S

2 H_{2} (g) + O_{2} (g) \to 2 H_{2} O (l)

300 K

S_{H_{2}}^{o} (g) = 126.6, S_{O_{2}}^{o} (g) = 201.20,

S_{H_{2} O} (l) = 68.0 J K^{- 1} m o l - 1

2 H_{2} S + S O_{2} \to 3 S + 2 H_{2} O

H_{2} S

S O_{2}

2 H_{2} S + S O_{2} \to 2 H_{2} O + 3 S

2 H_{2} {S O}_{4} 830^{o} C - --- \to {2 S O}_{x} + 2 H_{2} O + O_{2}

I_{2} + {S O}_{2} + {2 H}_{2} O 120^{o} C - -- \to z H I + H_{2} {S O}_{4}

2 H I 320^{o} C - -- \to y I_{2} + H_{2}

x, y

z

H_{2} - O_{2}

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