PLEASE HELP!!! I WILL RATE 5 STARS TONIGHT! Determine the specific volume of wat

Question

PLEASE HELP!!! I WILL RATE 5 STARS TONIGHT!

Determine the specific volume of water at 17.5 MPa and 500 oC using a) the steam tables, b) the ideal gas equation and c) the generalized compressibility chart (method of corresponding states). Given that the steam tables provide the most accurate value for the variable being evaluated, calculate the percentage error committed in parts b) and c) above.

Explanation / Answer

a) from the steam table, at 17.5Mpa and 500deg C v= 0.00784411 m^3/kg b) Ideal gas equation PV=nRT =>v=1000*R*T/(18*P) = 0.020392 m^3/kg c) compressibility factor of steam (z) at given state=0.476104 PV=znRT v = 0.020392*0.476104 = 0.009708712 m^3/kg thus calculate % error.

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