Calorimetry can be used to determine the enthalpy of a reaction. Select one: Tru

Question

Calorimetry can be used to determine the enthalpy of a reaction. Select one: True False How did you decide that the reaction of zinc (excess) with iodine was complete? Select one: When all the zinc was used up. When a precipitate was formed. When no more gas bubbles escaped the solution. When the color of the solution changed from purple/brown to colorless. The following is NOT acceptable in lab: Select one: Wearing shorts and flip-flops Recording observations in the lab notebook Always wearing goggles Asking questions If zinc metal was the limiting reactant., the excess iodine (aq) and the zinc iodide (aq) product could be separated by decantation or filtration. Select one: True False During the reaction of zinc with iodine in acidic solution Select one: heat was absorbed from the surroundings. there was no heat exchange. heat was given off to the surroundings. the temperature of the solution decreased.

Explanation / Answer

1.a 2.b 3.a 4.b 5.c

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