What is the enthalpy change for the reaction: C(s) + O2(g) → CO2(g)?

Practice Questions

Q1
What is the enthalpy change for the reaction: C(s) + O2(g) → CO2(g)?
  1. -393.5 kJ/mol
  2. -241.8 kJ/mol
  3. 0 kJ/mol
  4. 285.8 kJ/mol

Questions & Step-by-Step Solutions

What is the enthalpy change for the reaction: C(s) + O2(g) → CO2(g)?
  • Step 1: Identify the reaction. We have carbon (C) in solid form and oxygen (O2) in gas form reacting to form carbon dioxide (CO2) in gas form.
  • Step 2: Understand that the enthalpy change (ΔH) is the heat change that occurs during the reaction.
  • Step 3: Recognize that the enthalpy change for the formation of a compound from its elements is a standard value.
  • Step 4: Look up the standard enthalpy change for the formation of CO2 from its elements, which is known to be -393.5 kJ/mol.
  • Step 5: Conclude that the enthalpy change for the reaction C(s) + O2(g) → CO2(g) is -393.5 kJ/mol.
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