Question

Hess' law is used

• A. When a directly measured enthalpy change of reaction is not available
• B. To calculate an enthalpy change value through multiple steps.
• C. Because enthalpy is a state function.
• D. All of these options are correct

Answer 1

The correct option is D All of these options are correct

According to Hess' law, the change in enthalpy for a reaction is the same whether the reaction takes place in one or more steps.The Hess' law alternatively states that the enthalpy change for a chemical reaction is the same regardless of the path followed by the reaction since enthalpy is a state function.