Chem Midterm #3

Question 1

explain hess’s law and how it can be used

Answer 1

the enthalpy change of an overall process is the sum of the enthalpy changes of its individual steps. it allows us to find delta h for any reaction

Question 2

intermediate

Answer 2

substance formed as a product but consumed as a reactant later

Question 3

delta hrxn

Answer 3

delta H one plus delta H two plus delta H three

Question 4

manipulate chemical equations so they will sum to an overall reaction

Answer 4

turn series of equations back to original equation then use delta h rxn