The p V diagram in (Figure 1) shows a cycle of a heat engine that uses 0.250 mol

Question

The pV diagram in (Figure 1) shows a cycle of a heat engine that uses 0.250 mole of an ideal gas having =1.10. The curved part ab of the cycle is adiabatic. The internal energy of the gas changes by the following amounts: Uab=2220J,Ubc=1.06×104J, and Uca=+1.29×104J.

Part B

How much heat enters this gas per cycle?

Express your answer in joules to three significant figures.

Problem 16.07 The pV diagram in (Figure 1) shows a cycle of a heat engine that uses 0.250 mole of an ideal gas having Y 1.10. The curved part ab of the cycle is adiabatic. The internal energy of the gas changes by the following amounts: AU 2220 J 1.06 x 101 J, and AUr 1.29 x 10 J AUA Figure p (atm) v (m3 0.0020 0.0090 Part A Find the pressure of the gas at point a. Express your answer in pascals to three significant figures. 7.95x105 Pa Submit My Answers Give Up Correct Part B How much heat enters this gas per cycle? Express your answer in joulcs to three significant figures. Submit My Answers Give Up Incorrect Try Again: 2 attempts remaining; no points deducted Part C At what point in the cycle does heat enter the gas? C a

Explanation / Answer

B)

heat energy = n*Cv*dT

=n*Cv*(Ta-Tc)

=Cv*(n*Ta - n*Tc)

=Cv*(Pa*Va/R - PC*Va/R)

=Cv*Va/R*(Pa-Pc)

=(5/2)*0.002*(7.95*10^5 - 1.5*1.013*10^5)

=3215.25 J

C)

it happens from C to a

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