Maurice Tutor

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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 28 Sep 2017 My Price 5.00

atmospheric pressure

3.122 As shown in Fig. P3.122, a piston–cylinder assembly whose piston is resting on a set of stops contains 0.5 kg of helium gas, initially at 100 kPa and 25°C. The mass of the piston and the effect of the atmospheric pressure acting on the piston are such that a gas pressure of 500 kPa is required to raise it. How much energy must be transferred by heat to the helium, in kJ, before the piston starts rising? For the

2
 

helium, assume ideal gas behavior with cp 5 5 R.

3.116   A piston–cylinder assembly contains air at a pressure of 30 lbf/in.2 and a volume of 0.75 ft3. The air is heated at constant pressure until its volume is doubled. Assuming the ideal gas model with constant specific heat ratio, k 5 1.4, for the air, determine the work and heat transfer, each in Btu.

 

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Maurice Tutor
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Status NEW Posted 28 Sep 2017 11:09 PM My Price 5.00

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