It is the year 2023, in a fertilizer plant, ammonium sulphate is produced by reaction of ammonia and an

aqueous diluted solution of sulfuric acid. A colleague from your team, a mechanical engineer, was tasked

to size a heat exchanger to safely prepare solutions of sulfuric acid, but he is not familiar with the

thermodynamic calculations. You know that water is available at 100 F, whereas 40 wt. % sulfuric acid is

available at 120 F. Your colleague is in a rush to have a preliminary design and needs you to answer the

following calculations quickly.

1.

If 450 lbm of the 40 wt% sulfuric acid is mixed with 175 lbm of pure water, what is the resulting

solution concentration?

2.

You were asked to inform the engineer the amount of heat required in BTU if the final

solution is needed at 100 F? Is the heat added or removed?

3.

As a safety precaution, you were also tasked to determine the final temperature of the

solution if the mixing was carried out adiabatically./nSEP

Mul/solution

140

120

100

BO

60

-40

-60

-80

-100

120

-140

0

10

20

30

209

40 50 60

WL% H₂SO,

150

160

70

80

90 100

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