What is the enthalpy change for the formation of 1 mole of CO2 from its elements in their standard states?
Practice Questions
1 question
Q1
What is the enthalpy change for the formation of 1 mole of CO2 from its elements in their standard states?
-393.5 kJ/mol
-285.8 kJ/mol
0 kJ/mol
100 kJ/mol
The standard enthalpy of formation of CO2 is -393.5 kJ/mol.
Questions & Step-by-step Solutions
1 item
Q
Q: What is the enthalpy change for the formation of 1 mole of CO2 from its elements in their standard states?
Solution: The standard enthalpy of formation of CO2 is -393.5 kJ/mol.
Steps: 5
Step 1: Identify the elements that form CO2. These are carbon (C) and oxygen (O).
Step 2: Write the balanced chemical equation for the formation of CO2 from its elements: C(s) + O2(g) → CO2(g).
Step 3: Understand that the standard enthalpy of formation is the heat change when 1 mole of a compound is formed from its elements in their standard states.
Step 4: Look up the standard enthalpy of formation value for CO2, which is a known value.
Step 5: The standard enthalpy of formation of CO2 is -393.5 kJ/mol, indicating that the reaction releases energy.
