(A) The reaction $2SO_{2(g)} + O_{2(g)} \longrightarrow 2SO_{3(g)}$ occurs in the presence of platinized asbestos as a catalyst.Since the catalyst (pl

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(A) The reaction $2SO_{2(g)} + O_{2(g)} \longrightarrow 2SO_{3(g)}$ occurs in the presence of platinized asbestos as a catalyst.Since the catalyst (platinized asbestos,a solid) exists in a different phase from the reactants (gases),this is an example of a heterogeneous catalyst.