Watch the video shown above. (If you are having technical difficulty, don't worry. You can still answer the question without being able to see the video.)

Question

In the video, solid iodine and solid aluminum are mixed (with a tiny amount of water), yielding a highly exothermic reaction that gives off a lot of thermal energy (heat) and light. The equation for the reaction is written like this.

starting temperature ending temperature
20 o
C ?
Fill in the blanks to complete the following description.

(3 points)
This reaction gives off thermal energy, so we say it is
. If you could safely put your hand near the container as soon as it was safe to do so after the reaction had finished, you would expect the surroundings to feel
. You would expect the ending temperature to be
20 degrees Celsius.

Answer 1

This reaction gives off thermal energy, so we say it is exothermic. If you could safely put your hand near the container as soon as it was safe to do so after the reaction had finished, you would expect the surroundings to feel warm. You would expect the ending temperature to be above 20 degrees Celsius.