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In a closed rigid vessel, air is initially at a pressure of 0.3 MPa and volume of 0.1 m3 at 300 K. A
stirrer supplies 100 kJ of work to the air, while 20 kJ of heat is lost to the atmosphere across the
container walls. After these processes, the temperature of air changes to _________K.
  • a)
    321.9
  • b)
    702.4
  • c)
    782.4
  • d)
    620.2
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
In a closed rigid vessel, air is initially at a pressure of 0.3 MPa an...
All (100-20)=80 KJ/kg work is converted into heat at const volume. so,80=mCv.(T2-300);m= PV/RT
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Community Answer
In a closed rigid vessel, air is initially at a pressure of 0.3 MPa an...
Answer is 620.2
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In a closed rigid vessel, air is initially at a pressure of 0.3 MPa and volume of 0.1 m3 at 300 K. Astirrer supplies 100 kJ of work to the air, while 20 kJ of heat is lost to the atmosphere across thecontainer walls. After these processes, the temperature of air changes to _________K.a)321.9b)702.4c)782.4d)620.2Correct answer is option 'D'. Can you explain this answer?
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