Consider two identical pans containing the same amount of water that have been heated to different temperatures and then left to cool. Pan 1 was left undisturbed on the countertop, and pan 2 was left undisturbed outside. The temperature of pan 1 can be modeled by the function T (t) = 75 + 130e-0.055 where T(t) represents the temperature of the water, in degrees Fahrenheit (°F), t minutes after it starts to cool. The temperature of pan 2 can be modeled by the graph shown where T2(t) represents the temperature of the water, in degrees Fahrenheit (°F), t minutes after it starts to cool. -200 180 160 -140 420- PRIVACY 100 Temperature (degrees Fahrepheit)
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
![**Graph Analysis and Question Prompt for Educational Website**
### Temperature vs Time Graph
**Description:**
The image depicts a graph illustrating the relationship between temperature and time for two different pans of water. The temperature (measured in degrees Celsius) is plotted on the vertical (Y) axis, while the time (measured in minutes) is plotted on the horizontal (X) axis.
There are two curves on the graph:
1. **Curve A (Purple Line):** This curve starts at a higher initial temperature and shows a downward slope, indicating that the temperature of the water is decreasing over time.
2. **Curve B (Blue Line):** This curve begins at a lower initial temperature compared to Curve A and similarly shows a downward slope, indicating the same trend of temperature decline over time.
Both curves eventually plateau, suggesting that the temperatures of the water in both pans stabilize after a certain period.
**Graph Information:**
- **Y-Axis Range:** 0°C to 120°C.
- **X-Axis Range:** 0 minutes to 80 minutes.
- **Curve A (Purple):** Starts near 100°C.
- **Curve B (Blue):** Starts below 80°C.
- Both curves converge around the 60-minute mark, stabilizing to a near-constant temperature.
**Question Prompt:**
**Which pan of water had a higher initial temperature? Explain your reasoning.**
**Answer Explanation:**
To determine which pan of water had the higher initial temperature, observe the starting points of each curve on the Y-axis (temperature). Curve A (Purple) begins at a temperature close to 100°C, whereas Curve B (Blue) starts below 80°C. Therefore, it is evident that the pan of water represented by Curve A had a higher initial temperature. The reasoning lies in comparing the initial values on the temperature scale, where Curve A's starting point is significantly higher than that of Curve B.
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This content is designed to engage students in analyzing temperature change data, facilitating their understanding of data representation and interpretation in a real-world context.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F77e1707b-64cc-476f-bf4a-b0ca9fd95e81%2Fea5cc8a7-9dd1-45f7-936e-7d33235c18b5%2F1ba64rs_processed.jpeg&w=3840&q=75)
![**Cooling Rate of Heated Water in Pans**
Consider two identical pans containing the same amount of water that have been heated to different temperatures and then left to cool. Pan 1 was left undisturbed on the countertop, and Pan 2 was left undisturbed outside.
The temperature of Pan 1 can be modeled by the function:
\[ T_1(t) = 75 + 130e^{-0.055t} \]
where \( T_1(t) \) represents the temperature of the water, in degrees Fahrenheit (°F), \( t \) minutes after it starts to cool.
The temperature of Pan 2 can be modeled by the graph shown where \( T_2(t) \) represents the temperature of the water, in degrees Fahrenheit (°F), \( t \) minutes after it starts to cool.
**Graph Explanation:**
The graph depicts the cooling curve of Pan 2. The x-axis represents the time \( t \) in minutes after the cooling starts, and the y-axis represents the temperature \( T_2(t) \) in degrees Fahrenheit (°F).
- The temperature starts higher on the y-axis and decreases as time progresses.
- The curve demonstrates a gradual decline in temperature, indicating how the water cools over time.
The distinct decline in both models reflects the cooling behavior under different conditions (indoors vs. outdoors). The mathematical function and the graphical representation help visualize and compare the cooling rates of water in different environments.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F77e1707b-64cc-476f-bf4a-b0ca9fd95e81%2Fea5cc8a7-9dd1-45f7-936e-7d33235c18b5%2Fyngci35_processed.jpeg&w=3840&q=75)

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