Question
Temperature Control and Chocolate Sculptures
Temperature Control and Chocolate Sculptures
A chocolate artist wants to create small chocolate sculptures that can be purchased as gifts for special occasions. She will create the sculptures in a temperature-controlled room within her chocolate shop. Controlling the temperature of the room is necessary because the visual appearance of chocolate can change if it is heated or cooled outside of a specific temperature range. For example, if the chocolate rises above 18°C, the sculpture may begin to melt and change shape. If the chocolate drops below 15°C, the sculpture may begin to discolor as sugar in the chocolate crystallizes and rises to the surface.
The artist wants to design a box to transport the chocolate sculptures when they are delivered. The chocolate shop is located in a city where the temperatures range between 22°C and 30°C all year long. The temperature inside the delivery van is 20°C. The ideal box will be temperature-controlled using a pack that she will design. The pack will hold a chemical substance and 100 grams of water in separate parts of the pack. Squeezing the pack will combine the two substances, causing a chemical reaction to take place that absorbs or releases energy, depending on the substance. The packs will be activated and added to the insulated box and the chocolate sculpture when it is ready to be transported. The box to transport the chocolate sculptures is shown.
The chocolate artist purchases four different substances: ammonium nitrate, calcium chloride, sodium acetate, and sodium hydroxide. She will test the effects of each substance by adding various amounts to the 100 grams of water, then choose one to create the temperature-control packs. The initial temperature of the water before adding the substance is 20° Celsius. The table shows how much the temperature increased or decreased for each substance. A negative (-) in front of the temperature change indicates a decrease in temperature, and a positive (+) indicates an increase. The artist knows that the kinetic energy of the solution decreases as the temperature decreases.
Substance 10 g 20 g 30 g 40 g 50 g
ammonium nitrate -3 -6 -10 -14 -17
calcium chloride +11 +17 +24 +30 +35
sodium acetate -1 -2 -3 -4 -7
sodium hydroxide +12 +20 +29 +35 +41
Multiple Choice Question
The chocolate artist creates a temperature-control pack by adding 20 grams of calcium chloride to the pack along with the water. She tests the pack by placing it inside of a box along with some chocolate. The package is placed in the delivery van for one hour. When she opens the package, she finds that the chocolate melted. Which statement best explains why the temperature-control pack failed?
A.
The temperature-control pack needed to include a greater amount of calcium chloride than 20 grams.
B.
The temperature-control pack needed to include a smaller amount of calcium chloride than 20 grams.
C.
The temperature-control pack contained substances that reacted to create a cold pack, not a hot pack.
D.
The temperature-control pack contained substances that reacted to create a hot pack, not a cold pack.
Temperature Control and Chocolate Sculptures
A chocolate artist wants to create small chocolate sculptures that can be purchased as gifts for special occasions. She will create the sculptures in a temperature-controlled room within her chocolate shop. Controlling the temperature of the room is necessary because the visual appearance of chocolate can change if it is heated or cooled outside of a specific temperature range. For example, if the chocolate rises above 18°C, the sculpture may begin to melt and change shape. If the chocolate drops below 15°C, the sculpture may begin to discolor as sugar in the chocolate crystallizes and rises to the surface.
The artist wants to design a box to transport the chocolate sculptures when they are delivered. The chocolate shop is located in a city where the temperatures range between 22°C and 30°C all year long. The temperature inside the delivery van is 20°C. The ideal box will be temperature-controlled using a pack that she will design. The pack will hold a chemical substance and 100 grams of water in separate parts of the pack. Squeezing the pack will combine the two substances, causing a chemical reaction to take place that absorbs or releases energy, depending on the substance. The packs will be activated and added to the insulated box and the chocolate sculpture when it is ready to be transported. The box to transport the chocolate sculptures is shown.
The chocolate artist purchases four different substances: ammonium nitrate, calcium chloride, sodium acetate, and sodium hydroxide. She will test the effects of each substance by adding various amounts to the 100 grams of water, then choose one to create the temperature-control packs. The initial temperature of the water before adding the substance is 20° Celsius. The table shows how much the temperature increased or decreased for each substance. A negative (-) in front of the temperature change indicates a decrease in temperature, and a positive (+) indicates an increase. The artist knows that the kinetic energy of the solution decreases as the temperature decreases.
Substance 10 g 20 g 30 g 40 g 50 g
ammonium nitrate -3 -6 -10 -14 -17
calcium chloride +11 +17 +24 +30 +35
sodium acetate -1 -2 -3 -4 -7
sodium hydroxide +12 +20 +29 +35 +41
Multiple Choice Question
The chocolate artist creates a temperature-control pack by adding 20 grams of calcium chloride to the pack along with the water. She tests the pack by placing it inside of a box along with some chocolate. The package is placed in the delivery van for one hour. When she opens the package, she finds that the chocolate melted. Which statement best explains why the temperature-control pack failed?
A.
The temperature-control pack needed to include a greater amount of calcium chloride than 20 grams.
B.
The temperature-control pack needed to include a smaller amount of calcium chloride than 20 grams.
C.
The temperature-control pack contained substances that reacted to create a cold pack, not a hot pack.
D.
The temperature-control pack contained substances that reacted to create a hot pack, not a cold pack.
Answers
GPT-4o mini
The situation described involves the use of a temperature-control pack containing calcium chloride, which is known to generate heat when dissolved in water, thus creating a hot pack. The artist's intention was to cool down the environment to protect the chocolate sculptures, but instead, the pack generated heat.
The best explanation for why the chocolate melted when the artist opened the package is:
**D. The temperature-control pack contained substances that reacted to create a hot pack, not a cold pack.**
This indicates that the chosen substance (calcium chloride) increased the temperature instead of sufficiently cooling it, leading to the melting of the chocolate.
The best explanation for why the chocolate melted when the artist opened the package is:
**D. The temperature-control pack contained substances that reacted to create a hot pack, not a cold pack.**
This indicates that the chosen substance (calcium chloride) increased the temperature instead of sufficiently cooling it, leading to the melting of the chocolate.