Advanced manufacturing does NOT serve the transportation, communications, or medical industries. Is this statement TRUE or FALSE
2 answers:
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Answer:
m = 1.37 lbm
Explanation:
We are given that;
P1 = 90 psia
T1 = 30°F
From the table i attached, at T = 30°F, entropy, s1 = sf = 0.04752 Btu/lbm.R
We are also given;
P2 = 20 psia.
At this, s2 = s1 = 0.04752 Btu/lbm.R
From the table i attached, sf at 20 psia is; sf = 0.02605 Btu/lbm.R and sfg = 0.19962 Btu/lbm.R
Now, formula for quality of steam at Pressure P2 is;
X2 = (s2 - sf)/sfg
Plugging in the relevant values to obtain;
X2 = (0.04752 - 0.02605)/0.19962
X2 = 0.1076
Now, v2 = vf + x2•vfg
From the table i attached, at 20 psia, vf = 0.01182, vg =2.27772 and vfg = vg - vf = 2.27772 - 0.01182 = 2.2659 ft³/lbm
Thus,
v2 = 0.01182 + 0.1076*2.2659 = 0.2556 ft³/lbm
Now, let's find mass of the refrigerant from, m = V/v2
m = 0.35/0.2556 = 1.37 lbm
Answer:
c) 1.75 g/cm³
Explanation:
Given that
Radii of the A ion, r(c) = 0.137 nm
Radii of the X ion, r(a) = 0.241 nm
Atomic weight of the A ion, A(c) = 22.7 g/mol
Atomic weight of the X ion, A(a) = 91.4 g/mol
Avogadro's number, N = 6.02*10^23 per mol
Solution is attached below
