An ideal gas sealed in a rigid 5.87-L cylinder, initially at pressure Pi=10.10 atm, is cooled until the pressure in the cylinder is Pf=1.06 atm. A) What is the enthalpy change for this process? B) What is the change in internal energy for this process?

Chemistry by OpenStax (2015-05-04)
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Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
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Chapter5: Thermochemistry
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Problem 69E: Using the data in Appendix G, calculate the standard enthalpy change for each of the following...
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An ideal gas sealed in a rigid 5.87-L cylinder, initially at pressure Pi=10.10 atm, is cooled until the pressure in the cylinder is Pf=1.06 atm.

A) What is the enthalpy change for this process?

B) What is the change in internal energy for this process?

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