Your starting point here will be the balanced chemical equation for this reaction, which looks like this
#color(red)(2)"NO"_text((g]) + "O"_text(2(g]) -> 2"NO"_text(2(g])#
Now, you know that when this reaction takes place,
The fact that heat is being evolved, which is another term used for given off, tells you that you're dealing with an exothermic reaction.
So where would you write the energy term, on the reactants' side or on the products' side?
Well, you can think of heat given off as being heat produced. In other words, the reaction produces nitrogen dioxide,
Now, you know that
This means that your energy term will be
#color(red)(2)color(red)(cancel(color(black)("moles NO"))) * "13.6 kcal"/(1color(red)(cancel(color(black)("mole NO")))) = "27.2 kcal"#
Therefore, the chemical equation + energy term will look like this
#2"NO"_text((g]) + "O"_text(2(g]) -> 2"NO"_text(2(g]) + "27.2 kcal"#