Sulfur dioxide is oxidized according to with per mole of reaction

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

Sulfur dioxide is oxidized according to

2\,\text{SO}_{2}(g)+\text{O}_{2}(g)\rightarrow2\,\text{SO}_{3}(g)

with

\Delta H_{\text{rxn}}=-198\,\text{kJ}

per mole of reaction. If

128\,\text{g}

\text{SO}_{2}

(

M=64\,\text{g}\,\text{mol}^{-1}

) is completely converted to

\text{SO}_{3}

, which of the following best represents the heat exchanged with the surroundings? (a)

198\,\text{kJ}

absorbed (b)

99\,\text{kJ}

released (c)

198\,\text{kJ}

released (d)

396\,\text{kJ}

released