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SO2 + 1/2O2 --> SO3 ΔH = -99 kj
a. mol = 20/32+48=0,25
ΔH= 0,25 x (-99) = -24,75 kj
b. n = PV/RT = 1 x 10 / 0,082 x 298 = 0,41
ΔH= 0,41 x (-99) = -40,59
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