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Internal energy System is interior of vault Work done on system w >0 Heat gained q > 0 Heat lost w <0 Work done by system E OInternal 9<0 energy Internal energy Energy deposited into system ΔΕ >0 Energy withdrawn from system AE <0 A Figure 5.7 Sign conventions for heat and work. Heat, q, transferred into a system and work, w, done on a system are both positive quantities, corresponding to "deposits" of internal energy into the system. Conversely, heat transferred out of a system to the surroundings and work done by the system on the surroundings are both "withdrawals" of internal energy from the system.

Internal energy System is interior of vault Work done on system w >0 Heat gained q > 0 Heat lost w <0 Work done by system E OInternal 9<0 energy Internal energy Energy deposited into system ΔΕ >0 Energy withdrawn from system AE <0 A Figure 5.7 Sign conventions for heat and work. Heat, q, transferred into a system and work, w, done on a system are both positive quantities, corresponding to "deposits" of internal energy into the system. Conversely, heat transferred out of a system to the surroundings and work done by the system on the surroundings are both "withdrawals" of internal energy from the system.

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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Suppose a system receives a “deposit” of 50 J of work from the
surroundings and loses a “withdrawal” of 85 J of heat to the surroundings.
What is the magnitude and the sign of ΔE for this process?

Internal energy System is interior of vault Work done on system w >0 Heat gained q > 0 Heat lost w <0 Work done by system E OInternal 9<0 energy Internal energy Energy deposited into system ΔΕ >0 Energy withdrawn from system AE <0 A Figure 5.7 Sign conventions for heat and work. Heat, q, transferred into a system and work, w, done on a system are both positive quantities, corresponding to "deposits" of internal energy into the system. Conversely, heat transferred out of a system to the surroundings and work done by the system on the surroundings are both "withdrawals" of internal energy from the system.
Transcribed Image Text:Internal energy System is interior of vault Work done on system w >0 Heat gained q > 0 Heat lost w <0 Work done by system E OInternal 9<0 energy Internal energy Energy deposited into system ΔΕ >0 Energy withdrawn from system AE <0 A Figure 5.7 Sign conventions for heat and work. Heat, q, transferred into a system and work, w, done on a system are both positive quantities, corresponding to "deposits" of internal energy into the system. Conversely, heat transferred out of a system to the surroundings and work done by the system on the surroundings are both "withdrawals" of internal energy from the system.
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