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Chapter 2, Problem 30RQ

A gas is compressed inside a compressor's cylinder. When the piston is at its bottom dead center, the gas is initially at 10 psig, 65°F, and 10.5 in3. After compression and when the piston is at top dead center, the gas is 180°Fand occupies 1.5 in3. What would be the new pressure of the gas in psig?

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A gas is compressed inside a compressor’s cylinder. Whenthe piston is at its bottom dead center, the gas is initiallyat 10 psig, 65°F, and 10.5 in3. After compression andwhen the piston is at top dead center, the gas is 180°Fand occupies 1.5 in3. What would be the new pressure ofthe gas in psig?
During processing in a steel mill, a 375kg steel casting at 800 degrees  is quenched by plunging it into a 500-gal oil bath, which is initially 75 degrees . After the casting cools and the oil bath warms , what is the final tempertature of the two? The weight per unit volume of the oil is 7.5 lb/gal.
THERMODYNAMICS UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS. NO LONG EXPLANATION NEEDED. BOX THE FINAL ANSWER AND USE 3 DECIMAL PLACES. A rigid, perfectly insulated system contains 0.53m3 of helium at 1000 kPa. The system receives 1000 kJ of paddle work. Determine the final pressure. (ANSWER: 2256 kPa)

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