When n2g reacts with o2g to form no2g according to the

Question

When N₂(g) reacts with O₂(g) to form NO₂(g) according to the following equation, energy is absorbed from the surroundings.

• N₂(g) + 2O₂(g)--->2NO₂(g)

Is this reaction endothermic or exothermic? _________ermic

What is the sign of ΔH for the reaction? _________(poitive or negative)

Would the energy of the surroundings increase or decrease as a result of this process? _________