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One of the possible initial steps in the formation of acid rain is the oxidation of...

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Chemistry

One of the possible initial steps in the formation of acid rainis the oxidation of the pollutant SO2 to SO3 by the followingreaction: SO2(g) + 1/2 O2(g) -> SO3(g) The reaction isexothermic, meaning that it is spontaneous at lower temperatures,but becomes nonspontaneous at higher temperatures. At whattemperature does it change from being spontaneous tononspontaneous?

Molecule ΔHf (kJ/mol) @ 25°C S (J/molK) @ 25°C

SO2(g) -296.8 248.2  

SO3(g) -395.7 256.8

503 K

1052 K

98.7 K

99.1 K

Answer & Explanation Solved by verified expert
4.5 Ratings (755 Votes)
SO2g 12O2g SO3gH0 H0f products H0f    See Answer
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