Air in a large building is kept warm by heating it with steam in a heat exchanger. Superheated vapor water enters this unit at…A….MPa. …B….°C at a rate of …C….kg/h and leaves as saturated liquid at …D….°C. Air at 1-atm pressure enters the unit at …E….°K and leaves at …F….°K at about the same pressure. Determine the rate of entropy generation associated with this process

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

"the sandy walls seemed to collapse in on themselves"

and

"the bloodshot waters seemed to have no bottom"

answer: your option is c.

explanation: