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0 Energy withdrawn from system AE 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
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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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Energy withdrawn from system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0 Energy withdrawn from system AE 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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