CEM 142 Exam 3 MSU Questions and Answers Rated A+

CEM 142 Exam 3 MSU Questions and Answers Rated A+ What do you know about reactions? (make a list) -Atoms are conserved. They are only re- arranged. -Properties of products are emergent (not a mixture of the reactants properties). -Reactions can be classified by the type of reaction (how it occurs). -Reactions are always accompanied by an energy change (can be exo and endo) that results from changed in interactions (bonds and IMFs) in the reactants and products. -Reactions are always accompanied by an entropy change. What are the two main typed of reactions? -Acid-base -Redox *Always accompanied by a changed in entropy. Can you predict the properties of products if you know the properties of the reactants? A. Yes B. No C. It depends D. I dont know -B *Properties include smell, melting point, boiling point, and color. For the reaction: A+B--C If A is yellow and B is blue, what color is C? A. Yellow B. Blue C. Green D. I dont know -D *React NOT mix. C = completely new product. What thermodynamic function tells you about how far a reaction will "go"? A. Delta H B. Delta S (system) C. Delta G D. None of these -C *If (+) will NOT happen. *If (-) WILL happen. What thermodynamic function tells you about how fast a reaction will "go"? A. Delta H B. Delta S (system) C. Delta G D. None of these -D *Delta H = energy change / only heat. *Delta S = Number of possible arrangements in system. *Delta G = How far the reaction will go. Reactions can "go" both ____________ and _____________! The sign of __________ will tell you whether a reaction will go forwards or backwards. -Forwards and Backwards. -Delta G. How fast a reaction goes depends on...? -Activation Energy. Acid Base reaction are ____________. (speed). However, this does not mean that an Acid Base reaction will go to...? -Fast.