Jawaban:

Mass flow rate max = 0.004 kg/s

P_back = 100 kpa

Mass flow rate for hydrogen = 0.002 kg/s

Penjelasan:

Assumed that the gas is ideal condition. Thus

PV=nRT (Assume that the mole of gas is 1 mole)

PV = RT

P (mass flow rate/density) = RT

Mass flow rate = Density * RT / P = 0.1785 * 8.314 * 270 / (100 * 10^3) = 0.004 kg/s

*Ket:

 Density of helium = 0.1785 kg/m3

b. Use bernoulli equation

Pa = Pb

P_back pressure = 100 kpa

c.If hydrogen is the working fluid, thus the density become

Density = 0.08375 kg/m3

Mass flow rate = Density * RT / P = 0.08375 * 8.314 * 270 / (100 * 10^3) = 0.00188 kg/s, dibulatkan menjadi 0.002 kg/s