3. A paraffin wax candle weighs 10.553 grams. The candle is lit and then immediately placed in a calorimeter that contains 125.0 g of water that is initially at 22.5 °C. After about 20 minutes of burning, the candle is extinguished and the final water temperature is 33.8 °C. The weight of the candle after burning is 9.871 grams. Assume that all of the energy that was in the burned paraffin wax is transferred to the water. Dwater final-intial a) Calculate the change in temperature (AT) of the water. 33.8°C-22.5°C DT watre 11.3°C b) Calculate the amount of energy that was released from the paraffin wax. Assume that all of the energy that was released from the paraffin was transferred to the water. Use the specific heat (S) of water (1.000 cal/g °C), the mass of the water that was in the flask, and the temperature change (AT) of the water to calculate the amount of energy (Q) that was transferred to the water, and thus the amount of energy that was released from the burned paraffin wax. ● I cal x11.3°C 1259 x 9°C = 1412.5 cal c) Calculate the mass of the paraffin wax that was burned. This is done by subtracting the mass of the candle remaining after burning from the original mass of the candle. 10.553-9.879 0.6829 d) Calculate the energy per gram of paraffin wax by dividing the energy that was released from the paraffin wax (from part b) by the mass of the paraffin that was burned (from part c). Quater Mass of burned Candle 1412.5 cal 0.6829 Massot water: 125g Specific heat: Ical/g 2 = 2071.11437 cal/g
3. A paraffin wax candle weighs 10.553 grams. The candle is lit and then immediately placed in a calorimeter that contains 125.0 g of water that is initially at 22.5 °C. After about 20 minutes of burning, the candle is extinguished and the final water temperature is 33.8 °C. The weight of the candle after burning is 9.871 grams. Assume that all of the energy that was in the burned paraffin wax is transferred to the water. Dwater final-intial a) Calculate the change in temperature (AT) of the water. 33.8°C-22.5°C DT watre 11.3°C b) Calculate the amount of energy that was released from the paraffin wax. Assume that all of the energy that was released from the paraffin was transferred to the water. Use the specific heat (S) of water (1.000 cal/g °C), the mass of the water that was in the flask, and the temperature change (AT) of the water to calculate the amount of energy (Q) that was transferred to the water, and thus the amount of energy that was released from the burned paraffin wax. ● I cal x11.3°C 1259 x 9°C = 1412.5 cal c) Calculate the mass of the paraffin wax that was burned. This is done by subtracting the mass of the candle remaining after burning from the original mass of the candle. 10.553-9.879 0.6829 d) Calculate the energy per gram of paraffin wax by dividing the energy that was released from the paraffin wax (from part b) by the mass of the paraffin that was burned (from part c). Quater Mass of burned Candle 1412.5 cal 0.6829 Massot water: 125g Specific heat: Ical/g 2 = 2071.11437 cal/g
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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![### Experiment: Calculating Energy Released from Paraffin Wax
#### Objective:
To determine the energy transferred to water from burning paraffin wax.
#### Procedure:
1. **Initial Measurements:**
- A paraffin wax candle weighs 10.553 grams.
- It is placed in a calorimeter with 125.0 grams of water at an initial temperature of 22.5°C.
2. **Burning:**
- The candle is lit and burns for 20 minutes, after which it is extinguished.
- The final temperature of the water is recorded as 33.8°C.
- The final weight of the candle is measured as 9.871 grams.
3. **Calculations:**
- Assume all energy is transferred to the water.
#### Calculations:
a) **Change in Temperature (ΔT) of Water:**
\[
\Delta T = \text{Final Temperature} - \text{Initial Temperature} = 33.8°\text{C} - 22.5°\text{C} = 11.3°\text{C}
\]
b) **Amount of Energy Released (Q):**
- Use the formula:
\[
Q = m \times S \times \Delta T
\]
where:
- \( m = 125 \, \text{g} \) (mass of water)
- \( S = 1.000 \, \text{cal/g°C} \) (specific heat of water)
- \(\Delta T = 11.3°\text{C}\)
- Calculation:
\[
Q = 125 \, \text{g} \times 1.000 \, \text{cal/g°C} \times 11.3°C = 1412.5 \, \text{cal}
\]
c) **Mass of Paraffin Wax Burned:**
\[
\text{Initial mass} - \text{Final mass} = 10.553 \text{g} - 9.871 \text{g} = 0.682 \text{g}
\]
d) **Energy per Gram of Paraffin Wax:**
- Use the energy from part b divided by the mass from part c:
\[
\text{Energy per gram} = \frac{1412.5 \](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb627db88-11ea-44a3-8305-fdf56fd9f46f%2F68931376-81e3-47a6-b086-f03c2338f4d1%2Fryomvke_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Experiment: Calculating Energy Released from Paraffin Wax
#### Objective:
To determine the energy transferred to water from burning paraffin wax.
#### Procedure:
1. **Initial Measurements:**
- A paraffin wax candle weighs 10.553 grams.
- It is placed in a calorimeter with 125.0 grams of water at an initial temperature of 22.5°C.
2. **Burning:**
- The candle is lit and burns for 20 minutes, after which it is extinguished.
- The final temperature of the water is recorded as 33.8°C.
- The final weight of the candle is measured as 9.871 grams.
3. **Calculations:**
- Assume all energy is transferred to the water.
#### Calculations:
a) **Change in Temperature (ΔT) of Water:**
\[
\Delta T = \text{Final Temperature} - \text{Initial Temperature} = 33.8°\text{C} - 22.5°\text{C} = 11.3°\text{C}
\]
b) **Amount of Energy Released (Q):**
- Use the formula:
\[
Q = m \times S \times \Delta T
\]
where:
- \( m = 125 \, \text{g} \) (mass of water)
- \( S = 1.000 \, \text{cal/g°C} \) (specific heat of water)
- \(\Delta T = 11.3°\text{C}\)
- Calculation:
\[
Q = 125 \, \text{g} \times 1.000 \, \text{cal/g°C} \times 11.3°C = 1412.5 \, \text{cal}
\]
c) **Mass of Paraffin Wax Burned:**
\[
\text{Initial mass} - \text{Final mass} = 10.553 \text{g} - 9.871 \text{g} = 0.682 \text{g}
\]
d) **Energy per Gram of Paraffin Wax:**
- Use the energy from part b divided by the mass from part c:
\[
\text{Energy per gram} = \frac{1412.5 \
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