A) Which of the following is not a driving force for a chemical reaction? transf

Question

A) Which of the following is not a driving force for a chemical reaction?

transfer of electrons, formation of a gas, formation of a solid, or dissolving of a salt

B) Suppose that for a certain process, 35 J of heat is given off while 25 J of work is done on the system. Calculate U for that process.

10 J, -60 J, 60 J, -10 J

C) Which of the following is evidence that a chemical reaction is taking place? (Select all that apply)

color change, production of heat, formation of a solid, formation of bubbles

D)If the same amount of heat is transferred to samples of various metals, all of the same mass and initially at the same temperature, which metal will achieve the highest final temperature after heating?

aluminum, silver, iron, gold

E) Suppose a reaction involving two reactants has stopped reacting. If more of the limiting reactant is added to the reaction mixture, which of the following is true?

no change in the amount of reactants and products will be observed, effect cannot be predicted from the information given, the amount of products will decrease, the amount of products will increase

Explanation / Answer

A ) answer : transfer of electrons

B)   U = -35 + 25 = -10 kJ

answer : - 10 kJ

C) color change, production of heat, formation of a solid, formation of bubbles all

D) answer : iron

E)   the amount of products will increase

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