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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. Massot water! 125g Specific heat: Ical/g2 x11.3°C ● I cal 1259 х дос x = 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 = 2071.11437 cal

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. Massot water! 125g Specific heat: Ical/g2 x11.3°C ● I cal 1259 х дос x = 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 = 2071.11437 cal

Chemistry
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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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-intiaal. a) Calculate the change in temperature (AT) of the water. DT water 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 125g x 9°C 33.8°C-22.5°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 1412.5 cal 0.6829 Massot water: 125g Specific heat: Ical/g 2 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 - 2071.11437 cal/g
Transcribed Image Text: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-intiaal. a) Calculate the change in temperature (AT) of the water. DT water 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 125g x 9°C 33.8°C-22.5°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 1412.5 cal 0.6829 Massot water: 125g Specific heat: Ical/g 2 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 - 2071.11437 cal/g
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