Yes!
But how do we know this?
Our investigation into temperatures and chemical reactions...
Hypothesis: If we do 3 test, ice water, water at room temperature, and hot water, to see if temperature really does effect chemical reactions, then the hot water will take the least amount of time.
We did all three experiments using alka-seltzer tablets and water, the only variable that changed was the temperature of each experiment .
TEST ONE:
Test one was preformed using 266 mL of hot water. We heated the water, in a beaker, on a hot plate until the water reached the temperature of 50˚ Celsius. The we removed the beaker from the hot plate. We dropped the alka-seltzer tablet into the water and timed how long the chemical reaction lasted. The reaction lasted about 21 seconds.
TEST TWO:
Test two was done using 266 mL of water that was at room temperature. This reaction took longer. It took about 36 seconds. The temperature of the water for this test was 23.4˚ Celsius.
TEST THREE:
In test three we added ice to 133 mL of water, instead of the 266 mL used in the other two tests. In this test the reaction lasted for about 1 minute and 58 seconds. The temperature was 1.9˚ Celsius in the beginning and by the end it had dropped down to .3˚ Celsius.
OBSERVATIONS:
In the first test the alka-seltzer did not sink; in the second test the alka-seltzer bounced around from the surface of the water to the bottom of the water and back up, and in the third test the alka-seltzer sank and did not rise back up to the surface until it was almost fully dissolved.
The fact that the colder the water the longer the reaction, or the slower the reaction, and the hotter water had a faster reaction proves that temperature does in fact play a role in chemical reactions.
The video to this is on my website, it is labeled Investigation Lab Video. Enjoy :-)
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