Question

$\underset{\left(g\right)}{N_2}+\underset{\left(g\right)}{O_2}+Heat\to 2\underset{\left(g\right)}{N}O$
$C_{(}s)+O_{2\left(g\right)}\to C{O}_{2\left(g\right)}+Q$
What information do you get from the above equations ? Comment.
Write an activity about how you conduct an experiment to show that more reactive metals replace less reactive metals from their compounds.

Answer 1

$N_2\left(g\right)+O_2\left(g\right)+Heat\to 2NO\left(g\right)⟶\left(1\right)$

$C\left(s\right)+O_2\left(g\right)+\to {CO}_2\left(g\right)+Q\to \left(2\right)$

Now for the 1st reaction heat is absorbed. So it is endothermic reaction. But for the 2nd reaction heat is evolved, so it is exothermic reaction.

$2NaOH+{CaCl}_2=2NaCl+Ca{\left(OH\right)}_2\downarrow$

Here Sodium is more reactive metal and it replaces calcium from its salt i.e, ${CaCl}_2$ giving white precipitation of ${Ca\left(OH\right)}_2$. Thus the above reaction is displacement reaction.