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III WICI a process occurs at constant external pressure. a) What is the sign of w for the system? Is work done by the system or on the system? b) Calculate the work in joules if the external pressure is 788 torr. 1L atm = 101.3 J Reaction 5.3 L 2.8 L c) Calculate the change in internal energy if the gas releases 2.55 kJ of heat.

III WICI a process occurs at constant external pressure. a) What is the sign of w for the system? Is work done by the system or on the system? b) Calculate the work in joules if the external pressure is 788 torr. 1L atm = 101.3 J Reaction 5.3 L 2.8 L c) Calculate the change in internal energy if the gas releases 2.55 kJ of heat.

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 17P
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7. The cylinder in the diagram below contains a gas in which a process occurs at constant external pressure. a) What is the sign of w for the system? Is work done by the system or on the system? b) Calculate the work in joules if the external pressure is 788 torr. 1L atm = 101.3 J P. Reaction 5.3 L 2.8 L c) Calculate the change in internal energy if the gas releases 2.55 kJ of heat. 8. A 100.0 g sample of copper is heated to 86.1 oC then allowed to cool. What is the final temperature if the sample releases 2.44 kJ of heat? The specific heat capacity of copper is 0.385 J/g°C. 9. A piece of aluminum is heated to a temp of 71.8°C, then placed in 150.0 mL of water at 20.7°C until
Transcribed Image Text:7. The cylinder in the diagram below contains a gas in which a process occurs at constant external pressure. a) What is the sign of w for the system? Is work done by the system or on the system? b) Calculate the work in joules if the external pressure is 788 torr. 1L atm = 101.3 J P. Reaction 5.3 L 2.8 L c) Calculate the change in internal energy if the gas releases 2.55 kJ of heat. 8. A 100.0 g sample of copper is heated to 86.1 oC then allowed to cool. What is the final temperature if the sample releases 2.44 kJ of heat? The specific heat capacity of copper is 0.385 J/g°C. 9. A piece of aluminum is heated to a temp of 71.8°C, then placed in 150.0 mL of water at 20.7°C until
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