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Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.104PAE: 9.104 An engineer is using sodium metal as a cooling agent in a design because it has useful thermal...
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Record the type of metal. (Enter "1" for aluminum; enter "2" for copper.) 1 Record the following masses to the nearest 0.01 g Table 5 Metal 26.98 4.0 Calorimeter 28.54 Calorimeter & Water 49 127.99 4.0✓ 4.0✓ Water Mass (g) 4.0 4.099.45 Enter the following temperatures to the nearest 0.1°C. Table 6 S ✔ ✓ Temperature (°C) Calorimeter & Water 4.0 19.5 4.0 99.6 Boiling Water Bath Maximum Temperature Reached 4.0 23.9 ✔ ✓ Results Calculate the specific heat and the molar heat capacity, C, of your metal, using Eq. 10d, in units of J/g °C and J/mol °C respectively. (Enter your answers to three significant figures.) AH₁ + AH calorimeter +AH₂ = m₁0water(Tfinal - T₁) + Ccalorimeter(Tfinal T₁) + m₂c₂(final - ₂) = 0 J/g °C J/mol. °C Compare the molar heat capacity to the Dulong and Petit value of 3R (R = 8.314 J/K mol). (Calculate the percent error. Enter your answer to three significant figures.) 4.0 %
Transcribed Image Text:Record the type of metal. (Enter "1" for aluminum; enter "2" for copper.) 1 Record the following masses to the nearest 0.01 g Table 5 Metal 26.98 4.0 Calorimeter 28.54 Calorimeter & Water 49 127.99 4.0✓ 4.0✓ Water Mass (g) 4.0 4.099.45 Enter the following temperatures to the nearest 0.1°C. Table 6 S ✔ ✓ Temperature (°C) Calorimeter & Water 4.0 19.5 4.0 99.6 Boiling Water Bath Maximum Temperature Reached 4.0 23.9 ✔ ✓ Results Calculate the specific heat and the molar heat capacity, C, of your metal, using Eq. 10d, in units of J/g °C and J/mol °C respectively. (Enter your answers to three significant figures.) AH₁ + AH calorimeter +AH₂ = m₁0water(Tfinal - T₁) + Ccalorimeter(Tfinal T₁) + m₂c₂(final - ₂) = 0 J/g °C J/mol. °C Compare the molar heat capacity to the Dulong and Petit value of 3R (R = 8.314 J/K mol). (Calculate the percent error. Enter your answer to three significant figures.) 4.0 %
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