Thermodynamics ( I\'ve already got part A and B, I need help with part C. Please

ID: 1543547 • Letter: T

Question

Thermodynamics ( I've already got part A and B, I need help with part C. Please show me the steps and equations) Thanks a lot

Determine the specific enthalpy of liquid water at 100 celsius and 10 Mpa.

a. by using compressed liquid table

V = 0.0010385 m^3/kg

u = 416.23 kj/kg

h= 426.62 kj/kg

b. by approximating it as a saturated liquid

v = 0.00043 m^3/kg

u = 419.06 kj/kg

h = 419.17 kj/kg

c. Determine the % of error involved in using the approximation rule.

(need help with this part, please make sure ur answer is correct)

Answer:-

Use following equation we can get the enthalphy

h@P,T = h@T+u@T( P+Psat)

Assume P @100 cenciuls = 101.35 Pa

= 419.06+0.00043 ( 10000+101.35)

= 423.40 kJ/Kg

So % error =( (423.40-419.06 ) / 423.40 ) *100

= 0.0102 *100

= 1.02 % (Answer)

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