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chemistry

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Given the thermochemical equation SO2(g) + ½ O2(g) ---> SO3 (g) DH = -99.1 kJ
calculate the enthalpy change (DH) when 89.6 g of SO2 is converted to SO3.
1. 69.3 kJ
2. -111 kJ
3. -139 kJ
4. 139 kJ
5. -69.3 kJ

i got -139 kj
but im so unsure may some one confirm it for me?

  • chemistry -

    Looks ok to me.

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