Select all of the following that have a heat of formation value $(H_f)$ of $Ok\frac{J}{m}ol.$ You should not need to look up any information in data tables to answer this question.

$B{r}_{2(g)}$

$H_2{O}_{(ll)}$

$N{a}^{+}$

$O_{2(aq)}$

$B{r}_{2(l)}$

$A{u}_{(s)}$