An enclosed chamber contains a gas that is cooled while stirred by a wheel. The work applied on the fluid is one-hundred fifty kilo-Joule. The final inter nal energy of the fluid is seven-hundred fifty kilo-Joule with a heat of nine-h ndred Joule. Determine the initial internal energy. Given: W = -150 kJ U2 = 750k kJ Q = -900 J Required: Ui Solution: Q = U+W Q = (U2- U1) + W U1 = U2 + W - Q U1 = 750 kJ + (-150 kJ) - (900 Jx 1 kJ/1000 J) U: = 600.9 kJ
An enclosed chamber contains a gas that is cooled while stirred by a wheel. The work applied on the fluid is one-hundred fifty kilo-Joule. The final inter nal energy of the fluid is seven-hundred fifty kilo-Joule with a heat of nine-h ndred Joule. Determine the initial internal energy. Given: W = -150 kJ U2 = 750k kJ Q = -900 J Required: Ui Solution: Q = U+W Q = (U2- U1) + W U1 = U2 + W - Q U1 = 750 kJ + (-150 kJ) - (900 Jx 1 kJ/1000 J) U: = 600.9 kJ
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Transcribed Image Text:An enclosed chamber contains a gas that is cooled while stirred by a
wheel. The work applied on the fluid is one-hundred fifty kilo-Joule. The
final inter nal energy of the fluid is seven-hundred fifty kilo-Joule with a heat
of nine-h ndred Joule. Determine the initial internal energy.
Given:
W = -150 kJ
U2 = 750k kJ
Q = -900 J
Required:
Ui
Solution:
Q = U+W
Q = (U2- U1) + W
U1 = U2 + W - Q
U1 = 750 kJ + (-150 kJ) - (900 Jx 1 kJ/1000 J)
U: = 600.9 kJ
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