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Calculate the standard entropy change for the dimerization of NO2: 2NO2(g)→N2O4(g)at 298 K, if

S◦ ∆H◦f J/K·mol
�NO2(g) 240.06 33.18
N2O4(g) 304.29 9.16
Answer in units of J/K·mol

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-175.8 j/k.mol

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