Recent content by snowwhite

  1. snowwhite

    Work problem -- Steam piston volume and work length

    How to calculate the Work done in a isobaric process piston?
  2. snowwhite

    Work problem -- Steam piston volume and work length

    The exponent is 1.135 Sorry about that
  3. snowwhite

    Work problem -- Steam piston volume and work length

    Homework Statement Steam is raised as saturated steam at 6 bar (g) and supplied to the first ( high pressure ) piston. The steam then exhausts from piston 1 at 3 bar (g). The steam is thought to expand adiabatically in accordance with PV^( 135 .1)= Constant Given the initial volume is...
  4. snowwhite

    Thermo question -- volumetric flows of dry steam and liquid water

    can u please provide me a web page to look at the specific volume of saturated liquid water at 9 MPa? or a good steam tables web page to look at it? I have books with steam tables, steam tables in pdf and really DOES NOT APPEAR LIQUID WATER. WHAT APPEARS ITS COMPRESSED WATER.?IS THAT IT?
  5. snowwhite

    Thermo molar volume question

    b) USING THE STEAM TABLES P= 1 MPA, V= 0.264 Vactual=0.25790 Z=PVactual/RT=0.9744 SO: CONCLUSION: As seen the Ideal Gas Assumption is very good for this case. The water vapour is acting ideally
  6. snowwhite

    Thermo molar volume question

    The IDEAL GAS LAW EQUATION: PV=nRT the pressure is always in PA or Kpa. I diveded by pressure to calculate the Volume Yes, the gas constant is in KJ/kg like I wroted it.
  7. snowwhite

    Thermo question -- volumetric flows of dry steam and liquid water

    looking at the steam tables: at 90 atm= 9MPA specific saturated steam volume is =0.001418metres cube/kg In my steam tables does not appear saturated liquid water volme. How can I find it?
  8. snowwhite

    Thermo question -- volumetric flows of dry steam and liquid water

    First, I convert the pressure given to bar. so: 9 atmx (1.01325bar)/1atm = 91.1925 bar I look these temperature in the steam table for specific volume of saturated steam and saturated liquid water, and these temperature does not appear. so I need to interpolate.How can I do it?
  9. snowwhite

    Thermo molar volume question

    PV= nRT, V=nRT/P= (1 mol)(8.314 JK^-1mol^-1)(573.15 ºK)/(1000)= 4.76 metres cube 145 psi= 10^5 Pa x 10 = 10^6Pa= (10^3 KPa)=1000 KPa= pressure To calculate the molar volume of steam: For steam: R= R/M= (8.31434)/18=0.4619 KJ/KG hence: PV=nRT So V=RT/P=(0.4619)(300+273.15)/1000 KPa=0.264...
  10. snowwhite

    Thermo molar volume question

    yes, of course. Ideal gas law equation: PV=nRT deal gas law: PV= nRT so: V= nRT/P= (18 mol)(8.314 JK^-1mol^-1)(573.15 ºK) ( ) = 85773.04=8.5x10(^4) metres cube
  11. snowwhite

    Thermo question -- volumetric flows of dry steam and liquid water

    The problem doesn´t mention if dry stream and liquid water are present together. The problem only provides me rate of pipe 100kg/s. The quality x=80 % =0.80 and the pressure= 90 atm. Determine the volumetric flows of dry steam and liquid water. do u know any formula to find the volumetric...
  12. snowwhite

    Thermo molar volume question

    so how can I calculate the molar volume using the steam tables? and how can I know if the water vapour is acting ideally?
  13. snowwhite

    Thermo question -- volumetric flows of dry steam and liquid water

    By the way, I always do everything different from everybody else that why I´m different
  14. snowwhite

    Thermo molar volume question

    It doesn´t say. I think it will be gauge pressure units of steam tables? vg= metres cube/kg If u want to have a look, Steam tables attached By the way, I always do everything different from everybody else, that why I´m different
  15. snowwhite

    Thermo question -- volumetric flows of dry steam and liquid water

    Steam flows down a pipe at a rate of 100kg/s. The steam flow has a quality of 80% at 90 atm. Determine the volumetric flows of dry steam and liquid water.
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