Question

Create a simple enthalpy diagram to represent the following reaction.
Ag(s) + sa004-1.jpgCl2(g) ® AgCl(s) + 127.0 kJ

Answer 1

Interpretation: the heat is shown on the product side, so the reaction is exothermic. ΔH = -127.0 kJ (127.0 kJ released).

Simple enthalpy diagram (ASCII)

Enthalpy (H)
|
| Reactants
| --------------------- Ag(s) + Cl2(g)
|
| ↓ ΔH = -127.0 kJ
| (127.0 kJ released)
|
| --------------------- AgCl(s)
| Products
+--------------------------------------------------> Reaction progress

Notes:
- The reactants are at higher enthalpy than the products by 127.0 kJ.
- The downward arrow indicates energy released; ΔH = -127.0 kJ.
- If you prefer a drawn diagram, plot two horizontal lines (reactants higher, products lower) separated by 127 kJ on the enthalpy axis and label the downward arrow with "-127.0 kJ (released)".