Question
State whether $\Delta S$ is positive, negative or zero for the following reactions.
i. $2 H _{2(g)}+ O _{2(g)} \rightarrow 2 H _2 O _{( l )}$
ii. $CaCO _{3(s)} \rightarrow CaO _{( s )}+ CO _{2(g)}$
i. $2 H _{2(g)}+ O _{2(g)} \rightarrow 2 H _2 O _{( l )}$
ii. $CaCO _{3(s)} \rightarrow CaO _{( s )}+ CO _{2(g)}$