An experiment
was conducted with two cups containing 100 ml of water each, cup A had only
water and we added 10 grams of calcium chloride (CaCl2 ( to the cup B.
Temperature was measured in each of the cups in the beginning of
the experiment and after five minutes. The following are the results of the
experiment:
Temperatures in
the cups during the experiment
Temperature after 5 minutes
((C°
Temperature at the beginning
((C°
Mass of calcium chloride (grams)
18
18
0
cup
A
27
18
10
cup
B
What can be concluded from these results? Use the video and the simulation below for more information, Then choose the correct answer.
(In addition, Calcium chloride (CaCl2)is an Ionic substance that can be used in order to melt snow. For more information go to the map.)
First of all , I liked
your idea, I think it appropriate to the mission .
References to improve
:
1. I think the video should be on the
point in the map and not in the question, in the question you could put only
the simulation.
2.The distracting should be
more difficult, for example in orde to say " The
reaction of dissolving calcium chloride in water is an endothermic reaction"
you should say for example , in this reaction ,
the energy of the reacts bigger than the energy of the products.
First, I liked very much the map point, this story added information to better understanding of your quiestion! The exepriment, that You did also was very good demonstration of the exothermic reactions.
To improve: The main question is missing. And I think, that the youtube film is confusing.
Good luck!
Julia
History of edits
More Interactive Questions that might interest you In Chemistry
Multimedia Questions
Inquiry Questions
