Chemistry worksheet with five enthalpy change calculation problems using Hess's Law.
A chemistry worksheet containing five problems (numbered 5 through 10) that require calculating the enthalpy change (ΔH) for various chemical reactions using Hess's Law and given sub-reactions with their corresponding ΔH values. Each problem includes a target reaction and a set of provided reactions with their ΔH values, with the final answer provided for each.