### Educational Content on Lightsticks3. **Lightsticks and Chemical Reactions** Lightsticks contain a substance that breaks down during a chemical reaction. A release of energy (as light) accompanies this reaction. Therefore, the amount of light released is proportional to the number of molecules breaking down. **a) Temperature and Light Intensity** The image shows two lightsticks submerged in beakers of water at different temperatures. One lightstick glows more brightly than the other. The brighter lightstick is in the warmer water. In warmer conditions, the reaction rate increases, resulting in more light being emitted due to faster molecular breakdown. **b) Effect of Freezing on Lightsticks** What would be the effect on the intensity of a lightstick and the duration of its glow if a lightstick was placed in a freezer? Placing a lightstick in a freezer would decrease its intensity because the chemical reaction slows down in colder temperatures. However, the duration of its glow would be extended since the reaction progresses more slowly, using up the reactants over a longer period.

During a chemical reaction, when energy is released in any form be it light or heat,then the…

3. Lightsticks contain a substance that breaks down during a chemical reaction. A release of energy (as light) accompanies this reaction. Therefore, the amount of light released is proportional to the number of molecules breaking down. a) The lightsticks below are in water of different temperatures. Which one is in the warmer water? b) What would be the effect on the intensity of a lightstick and the duration of its glow if a lightstick was placed in a freezer?

3. Lightsticks contain a substance that breaks down during a chemical reaction. A release of energy (as light) accompanies this reaction. Therefore, the amount of light released is proportional to the number of molecules breaking down. a) The lightsticks below are in water of different temperatures. Which one is in the warmer water? b) What would be the effect on the intensity of a lightstick and the duration of its glow if a lightstick was placed in a freezer?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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