Question

Consider the following reactions. (Note: (s) = solid , (1) = liquid, and (g) = gas)

Mg(s) + ½ O2(g) MgO(s) + 146 kcal/mole
H2(g) + ½ O2(g) H2O(g), H = -57.82 kcal/mole

The temperature of the surroundings will:

increase
decrease*?

Answer 1

Pretty sure it increase ;)

Answer 2

ok thanks