if the product has lesser energy than the reactants it means enthalpy change value is positive.so it is endothermic reaction where the heat is absorbed.so kcl will formation will have positive enthalpy change .
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Answer:
3.0 dm^3 of sulphur trioxide is formed
Explanation:
From Gay Lussac's law of combining volumes;
The equation is;
SO2(g) + 1/2O2(g) ------> SO3(g)
Reacting volumes 1 vol 1/2 vol 1 vol
Initial volumes 3.0 dm^3 2.0 dm^3 0.0 dm^3
Final volumes 0.00 dm^3 1.5 dm^3 3.0 dm^3
Hence, 3.0 dm^3 of sulphur trioxide is formed.
