Chemistry - January 2011

21 For a chemical reaction, the heat of reaction is equal to the

(1) potential energy of the reactants, only
(2) potential energy of the products, only
(3) potential energy of the products plus the potential energy of the reactants
(4) potential energy of the products minus the potential energy of the reactants

22 Given the equation representing a system at equilibrium:

23 The two isomers of butane have different

(1) formula masses       (3) molecular formulas
(2) empirical formulas   (4) structural formulas

24 An oxidation-reduction reaction involves the

(1) sharing of electrons
(2) sharing of protons
(3) transfer of electrons
(4) transfer of protons

25 Which energy change occurs in an operating voltaic cell?

(1) chemical to electrical
(2) electrical to chemical
(3) chemical to nuclear
(4) nuclear to chemical

 Previous Page Next Page




EduSolution -
Helping Students
to succeed!
Vistors' Comments

This is one of the absolute best sites I've found online, and I say that as a teacher who has spent countless hours looking for kid-friendly material on the net. I have no idea how you found the time and energy to put it together, but you have my admiration! - Andrew Cowells, Concord Jr. High