Which variety of steam is most appropriate for each case?

Of the processes proposed in Probs. 7.50 and 7.51, which would you recommend?

Why?

Liquids (identified below) at 25°C are completely vaporized at 1(atm) in a

countercurrent heat exchanger. Saturated steam is the heating medium, available at

four pressures: 4.5, 9, 17, and 33 bar. Which variety of steam is most appropriate for

each case? Assume a minimum approach ΔT of 10°C for heat exchange.

(a) Benzene;

(b) n-Decane;

(c) Ethylene glycol;

(d) o-Xylene