Part C State the direction of the heat flow. Submit My Answers Give Up Part D Do

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Part C

State the direction of the heat flow.

SubmitMy AnswersGive Up

Part D

Does it matter whether the gas is ideal?

A) into the gas B) out of the gas ? Chrome File Edit View History Bookmarks People Window Help MasteringPhysics: Chapter 19 Homework https://session.masteringphysics.com/myct/itemView?assignmentProblemID=59016880 MPABRAHAM25242016S Chapter 19 HomeworkExercise 19.12 Signed in as Tanner Calloway Help Close Resources « previous | 4 of 11 | next » Exercise 19.12 Part A A gas in a cylinder is held at a constant pressure of 2.25x105 Pa and is cooled and compressed from a volume of 1.64 m to 1.16 mThe internal energy of the gas decreases by 1.33×105 J . Find the work done by the gas Express your answer using three significant figures Submit My Answers Give Up Part B Find the absolute value of the heat flow into or out of the gas Express your answer using three significant figures Submit My Answers Give Up Part C State the direction of the heat flow

Explanation / Answer

a) The work done by the gas is,
dW = P dV
where dW is work done, P is Pressure applied and dV is change in Volume produced.
So, dW = 2.25x10^5 x (1.64 - 1.16)
= 108000 Joules.
(The work done is positive, as it involves compression, and work is done on the system)

b) By first law of Thermodynamics, dU = dQ - dW
Then, as the question says, dU = -1.33x10^5 J (Neagtive, as energy decreases.)
and we calculated work done, dW = 108000 J
then, dQ, which is heat transferred, is, dQ = dU + dW
= 25000 Joules.

c) Heat is transferred into the system, that is, the gas becomes hot. This is mathematically shown by the positive value of heat obtained in the previous calculation.

part D

yes

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