Question

When SO₂(g) reacts with O₂(g) according to the following reaction, 98.9 kJ of energy are evolved for each mole of SO₂(g) that reacts. Complete the following thermochemical equation.

• 2SO₂(g) + O₂(g)2SO₃(g)    H =  kJ

Answer 1

2SO_2(g) $+$ O_2(g) $\to$ 2SO_3(g) $\Delta\>H=-98.9kJ/mol$