What is the enthalpy change for the reaction: C(s) + O2(g) → CO2(g) if the stand
Practice Questions
Q1
What is the enthalpy change for the reaction: C(s) + O2(g) → CO2(g) if the standard enthalpy of formation of CO2 is -393.5 kJ/mol?
-393.5 kJ/mol
393.5 kJ/mol
0 kJ/mol
Not enough information
Questions & Step-by-Step Solutions
What is the enthalpy change for the reaction: C(s) + O2(g) → CO2(g) if the standard enthalpy of formation of CO2 is -393.5 kJ/mol?
Step 1: Identify the reaction: C(s) + O2(g) → CO2(g). This shows carbon and oxygen reacting to form carbon dioxide.
Step 2: Understand what standard enthalpy of formation means. It is the change in enthalpy when one mole of a compound is formed from its elements in their standard states.
Step 3: Note that the standard enthalpy of formation of CO2 is given as -393.5 kJ/mol. This value indicates that when CO2 is formed from carbon and oxygen, energy is released.
Step 4: Since the reaction is forming CO2 from its elements (C and O2), the enthalpy change for this reaction is the same as the standard enthalpy of formation of CO2.
Step 5: Therefore, the enthalpy change for the reaction C(s) + O2(g) → CO2(g) is -393.5 kJ/mol.
