4.
point B, cross sectional area = 1 m²
P = 100,000 Pascals abs
200 Kelvin
?
Nitrogen (N?) liquid is piped up from a tank
through adiabatic tubing to a bath
that stores cryogenic vaccine.
Nitrogen leaves the system as a gas.
\begin{tabular}{c|c|c}
$T_c$ & $P_c$ & $(n/V)_c$ \\
\hline
nitrogen & 126.2 & 3434917.5 & 11135.857 \\
Kelvin & Pascals & mol/m³
\end{tabular}
1 kg
hr
N?
$\Delta H_{vap, 77 K, 101325 Pa} = 200,000 \frac{J}{kg}$
point A
cross sectional area = 0.0003 m²
P = 500,000 Pascals abs
77 Kelvin
Nitrogen (N?) GAS heat capacity in J/(kgĀ·Kelvin)
(T is in Kelvin)
$C_p^o = 1,035.2 + 0.0662T - 0.00034455T^2 + 0.00000059412T^3 + 4,178.6 / (T^2)$
20 meters