Question

. A rigid tank contains 10 𝑘𝑔 of water at 90𝑜 𝐶. If 8 𝑘𝑔 of the water is in the liquid form

and the rest is in vapour form, determine:

i. the pressure in the tank,

ii. the volume of the tank.

Answer 1

$p=p_{sat}(T)=70.2~kPa,$

$v_f=0.001036~\frac{m^3}{kg},$

$v_g=2.3593~\frac{m^3}{kg},$

$V_f=m_fv_f=0.01~m^3,$

$V_g=m_gv_g=4.72~m^3,$

$V=V_f+V_g=4.73~m^3.$