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Energy cannot be created nor destroyed, but it can be transferred between a system and its surroundings. The change in internal energy. AU, is positive if the system absorbs energy, and it is negative if the system releases energy (Egure 1) The total change in internal energy is the sum of the heat. q. and work, w AUq+w igure AU >0 All <0 Surroundings u System Surroundings System U 1 of 1 > Classify the following by the sign of AU for the system. Drag the appropriate items to their respective bins. If no definitive classification can be made, drag the item into the bin labeled "Not enough data." View Available Hint(s) Negative The system expands and the surroundings get hotter ✓ Correct ▾ Part B ΔΕ - Submit Previous Answers Positive HA The system contracts and the surroundings get colder A gaseous reaction occurs at a constant pressure of 30.0 atm and releases 57.1 kJ of heat. Before the reaction, the volume of the system was 6.80 L. After the reaction, the volume of the system was 2.40 L. Calculate the total internal energy change. AU, in kilojoules. Express your answer with the appropriate units. View Available Hint(s) Value Reset Help Units Not enough data The system contracts and the surroundings get hotter The system expands and the surroundings get colder

Energy cannot be created nor destroyed, but it can be transferred between a system and its surroundings. The change in internal energy. AU, is positive if the system absorbs energy, and it is negative if the system releases energy (Egure 1) The total change in internal energy is the sum of the heat. q. and work, w AUq+w igure AU >0 All <0 Surroundings u System Surroundings System U 1 of 1 > Classify the following by the sign of AU for the system. Drag the appropriate items to their respective bins. If no definitive classification can be made, drag the item into the bin labeled "Not enough data." View Available Hint(s) Negative The system expands and the surroundings get hotter ✓ Correct ▾ Part B ΔΕ - Submit Previous Answers Positive HA The system contracts and the surroundings get colder A gaseous reaction occurs at a constant pressure of 30.0 atm and releases 57.1 kJ of heat. Before the reaction, the volume of the system was 6.80 L. After the reaction, the volume of the system was 2.40 L. Calculate the total internal energy change. AU, in kilojoules. Express your answer with the appropriate units. View Available Hint(s) Value Reset Help Units Not enough data The system contracts and the surroundings get hotter The system expands and the surroundings get colder

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter12: Thermodynamic Processes And Thermochemistry
Section: Chapter Questions
Problem 71AP
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Energy cannot be created nor destroyed, but it can be transferred between a system and its surroundings. The change in internal energy, AU, is positive if the system absorbs energy, and it is negative if the system releases energy. (Figure 1) The total change in internal energy is the sum of the heat, q, and work, w: AU=q+w. igure AU Allgyntem >0 Al system <0 U Surroundings System Surroundings System U AU = q + w < 1 of 1 > ▼ Part A Classify the following by the sign of AU for the system. Drag the appropriate items to their respective bins. If no definitive classification can be made, drag the item into the bin labeled "Not enough data." ▸ View Available Hint(s) Negative The system expands and the surroundings get hotter Submit ✓ Correct Part B Submit Previous Answers AU- Value Provide Feedback Positive μA The system contracts and the surroundings get colder. A gaseous reaction occurs at a constant pressure of 30.0 atm and releases 57.1 kJ of heat. Before the reaction, the volume of the system was 6.80 L. After the reaction, the volume of the system was 2.40 L. Calculate the total internal energy change, AU, in kilojoules. Express your answer with the appropriate units. ▸ View Available Hint(s) Units Reset Help ? Not enough data The system contracts and the surroundings get hotter. The system expands and the surroundings get colder. Mord &
Transcribed Image Text:Energy cannot be created nor destroyed, but it can be transferred between a system and its surroundings. The change in internal energy, AU, is positive if the system absorbs energy, and it is negative if the system releases energy. (Figure 1) The total change in internal energy is the sum of the heat, q, and work, w: AU=q+w. igure AU Allgyntem >0 Al system <0 U Surroundings System Surroundings System U AU = q + w < 1 of 1 > ▼ Part A Classify the following by the sign of AU for the system. Drag the appropriate items to their respective bins. If no definitive classification can be made, drag the item into the bin labeled "Not enough data." ▸ View Available Hint(s) Negative The system expands and the surroundings get hotter Submit ✓ Correct Part B Submit Previous Answers AU- Value Provide Feedback Positive μA The system contracts and the surroundings get colder. A gaseous reaction occurs at a constant pressure of 30.0 atm and releases 57.1 kJ of heat. Before the reaction, the volume of the system was 6.80 L. After the reaction, the volume of the system was 2.40 L. Calculate the total internal energy change, AU, in kilojoules. Express your answer with the appropriate units. ▸ View Available Hint(s) Units Reset Help ? Not enough data The system contracts and the surroundings get hotter. The system expands and the surroundings get colder. Mord &
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