Question

Saturated steam at 200 bar is to be heated at constant pressure to 650°C. Using appropriate deviations, determine ∆h, the heat added, ∆s, and the specific volume at state 2. Compare results with values read from the Mollier chart, Item B 16 (SI).

Answer 1

Enthalpy

$∆H=U+PV$

$∆H=U+200\times10^5\times V$

Entropy

$S=\frac{∆Q}{T}$

$S=\frac{mL}{T}$

boron

$M=50.2\times1.67\times10^{-27}kg$

Latent heat

$$S=\frac{50.2\times1.67\times10^{-27}\times10}{923}=9.082\times10^{-28}J/K$$

Millier chart