Question:
\(\text{CH}_{4(g)}\rightarrow \text{C}_{(g)}+4\text{H}_{(g)}\), \(\Delta H=1660\) kJ/mol.
What type of enthalpy does the reaction represent?
\(\text{CH}_{4(g)}\rightarrow \text{C}_{(g)}+4\text{H}_{(g)}\), \(\Delta H=1660\) kJ/mol.
What type of enthalpy does the reaction represent?
What type of enthalpy does the reaction represent?
Show Hint
The reaction breaks one mole of a substance into its gaseous atoms.
Updated On: Nov 12, 2026
- Enthalpy of decomposition
- Enthalpy of atomization
- Enthalpy of ionization
- Enthalpy of vaporization
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Enthalpy of atomization is the enthalpy change when one mole of a substance is completely broken into gaseous atoms.
Step 2: Analyse the Reaction
\(\text{CH}_{4(g)} \rightarrow \text{C}_{(g)} + 4\text{H}_{(g)}\)
One mole of methane dissociates completely into gaseous atoms of carbon and hydrogen.
Step 3: Compare the Options
Decomposition gives simpler substances, ionization gives ions and vaporization is a change from liquid to gas.
The given change matches atomization.
Final Answer:
The reaction represents the enthalpy of atomization. \[ \boxed{\text{(B) }\text{Enthalpy of atomization}} \]
Enthalpy of atomization is the enthalpy change when one mole of a substance is completely broken into gaseous atoms.
Step 2: Analyse the Reaction
\(\text{CH}_{4(g)} \rightarrow \text{C}_{(g)} + 4\text{H}_{(g)}\)
One mole of methane dissociates completely into gaseous atoms of carbon and hydrogen.
Step 3: Compare the Options
Decomposition gives simpler substances, ionization gives ions and vaporization is a change from liquid to gas.
The given change matches atomization.
Final Answer:
The reaction represents the enthalpy of atomization. \[ \boxed{\text{(B) }\text{Enthalpy of atomization}} \]
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