Consider the following chemical reaction which produces water from its constituent elements:
2 H$_2$ (g) + O$_2$(g)→2 H$_2$O (l) $\Delta_r$H = -571.6 kJ/mol
If hydrogen and oxygen were mixed and allowed to react under constant pressure conditions, which of the following statements must be true?
Select as many answers as applicable however points will be deducted for incorrect guesses.
The temperature of the surroundings would decrease
$\Delta$H = $\Delta$U
The temperature of the surroundings would increase
$\Delta$H = q
This is an endothermic reaction