Hey someone please answer this...

31 mol N₂

General Formulas and Concepts:

Chemistry - Stoichiometry

Explanation:

Step 1: Define

25 mol HCl

Step 2: Identify Conversions

RxN:   4 mol HCl = 5 mol N₂

Step 3: Stoichiometry

= 31.25 mol N₂

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

31.25 mol N₂ ≈ 31 mol N₂

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.