Heat flow in and out of a cabaret

[Dreebs]

Homework Statement

Keeping the cabaret door closed is important, so you install a sophisticated door control system that keeps the air exchange between inside and outside to a minimum. Why will such air exchanges always require the climate control system to work harder and consume extra electricity (and cost more money)?
Select one:
a. The air that flows out of the cabaret carries less thermal energy with it than the air that enters the cabaret to replace it. Your system will therefore have to remove thermal energy from the cabaret air.
b. Leaks always lead to the creation of additional disorder, so your system will have to consume more electricity to make up for the loss.
c. The air that flows out of the cabaret carries more thermal energy with it than the air that enters the cabaret to replace it. Your system will therefore have to add thermal energy to the cabaret air.
d. Moving air either into or out of the cabaret involves work and therefore requires the consumption of electricity.

Homework Equations

N/A

The Attempt at a Solution

C, because with air flowing out of the cabaret, the heat pump will have to work to heat the cabaret constantly.

 

[scottdave]

Is there any other context information?

 

[Dreebs]

Is there any other context information?

Im sorry, this is all the information I was given.

 

[jbriggs444]

c. The air that flows out of the cabaret carries more thermal energy with it than the air that enters the cabaret to replace it. Your system will therefore have to add thermal energy to the cabaret air.

What assumptions does this make about the temperature of the cabaret relative to the street outside?

 

[Dreebs]

What assumptions does this make about the temperature of the cabaret relative to the street outside?

It assumes it is colder outside, since air flows from hot to cold naturally I believe

 

[BvU]

Is there any other context information?

You could search for the word 'cabaret' posted by user Dreebs -- 9 hits !

 

[jbriggs444]

It assumes it is colder outside, since air flows from hot to cold naturally I believe

Yes. Now how does that information reflect on the correctness or not of answer C?

 

[scottdave]

You could search for the word 'cabaret' posted by user Dreebs -- 9 hits !

Yes, thanks. Knowing that the goal is to heat the cabaret in the winter time definitely is the context information that I was hinting at.