Answer to Question #263090 in Physical Chemistry for John

Question

Which of the following statements are correct?

I)The enthalpy of formation of an element is zero by definition

II)The enthalpy of combustion of an element is zero by definition

III)The enthalpy change of reaction is the heat change at constant pressure

IV) According to Hess’s law the enthalpy change for a chemical reaction is the same, whatever route is taken from reactants to products

A.     I)

B.     I) and II)

C.     II), III) and IV)

D.     All of the statements are correct

Answer 1

D. All of the statements are correct