Chemistry

Problem

For which reaction from the following,

\Delta S

will be maximum? (1)

\text{Ca(s)} + \frac{1}{2}\text{O}_2\text{(g)} \longrightarrow \text{CaO(s)}

(2)

\text{CaCO}_3\text{(s)} \longrightarrow \text{CaO(s)} + \text{CO}_2\text{(g)}

(3)

\text{C(s)} + \text{O}_2\text{(g)} \longrightarrow \text{CO}_2\text{(g)}

(4)

\text{N}_2\text{(g)} + \text{O}_2\text{(g)} \longrightarrow 2\text{NO(g)}