# KChapter 5 The First Law and EnthalpyProblem 5.38 - Enhanced - with Feedback1 of 2A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the following figure. When 0.480 kJ of heat is added to the gas, it expandsand does 217 J of work on the surroundings.Energy can enter orleave system as heat oras work done on pistonMatter cannot enteror leave systemSurroundings cylinder,piston, and everything beyondSystem H2(g) and Og)You may want to reference (Pages 172 - 176) Section 5.3 while completing this problem.Part AWhat is the value of AH for this process?Express the energy in kilojoules to three significant digits.Vα ΑΣφ plem 5.38 - Enhanced - with Feedback1 of 2Surroundings cylinder,piston, and everything beyondSystem H2(g) and Og)You may want to reference (Pages 172 - 176) Section 5.3 while completing this problem.Part APart BWhat is the value of AE for this process?Express the energy in kilojoules to three decimal places.ΑΣφ?ΔΕΞkJPrevious Answers Request AnswerSubmit

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Asked Oct 19, 2019
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I need help on part B. Another person answered that it was .480, but it says it’s incorrect.

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Step 1

Given information:

Heat absorbed by the gas = 0.480 kJ

Work done by the system = 270 J

Step 2

According to first law of thermodynamics the change in internal energy is equal to the heat absorbed by system (q) minus the amount of work done by the system (w). The mathematical expression for energy can be represented as follows:

Step 3

As, the change in internal energy will be equal to the energy of the syst...

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