What is the enthalpy change for the reaction: N2(g) + 3H2(g) → 2NH3(g)?
Correct Answer: Negative enthalpy change
- Step 1: Identify the reactants and products in the reaction: N2(g) + 3H2(g) → 2NH3(g).
- Step 2: Understand that enthalpy change refers to the heat energy change during a chemical reaction.
- Step 3: Recognize that the formation of ammonia (NH3) from nitrogen (N2) and hydrogen (H2) releases heat.
- Step 4: Since heat is released, the reaction is classified as exothermic.
- Step 5: In exothermic reactions, the enthalpy change is represented as a negative value.
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