已知，SmӨ（SO2）=248.2 J·mol-1·K-1，SmӨ（O2）=205.2 J·mol-1·K-1，SmӨ（SO3）=256.8 J·mol-1·K-1。则反应2SO2(g)+O2(g)⇌2SO3(g)的ΔrSmӨ为J·mol-1·K-1 A: -196.6 B: 196.6 C: -188 D: 188
已知，SmӨ（SO2）=248.2 J·mol-1·K-1，SmӨ（O2）=205.2 J·mol-1·K-1，SmӨ（SO3）=256.8 J·mol-1·K-1。则反应2SO2(g)+O2(g)⇌2SO3(g)的ΔrSmӨ为J·mol-1·K-1 A: -196.6 B: 196.6 C: -188 D: 188
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