Chemistry for Engineers Gas Law's

Question

Determine the property/ies of gases changed in following situations. Then, explain why these properties are shown in a given situations.

A. Pressure B. Temperature C. Amount of Substance D. Volume

1. Respiration of organisms in high altitude areas.

2. Pushing in the plunger of a plugged-up syringe.

3. Decreasing of lungs’ capacity to get air in deep sea level.

4. Hot air balloon in the sky.

5. Big party balloons for Asta’s birthday.

Answer 1

Hello, Ely,

This is a bit of an abstract question, but I'll do my best:

A. Pressure B. Temperature C. Amount of Substance D. Volume

1. Respiration of organisms in high altitude areas. (A): Higher elevations mean less pressure and moisture will evaporate more quickly. [I'm assuming temperature is the same].

2. Pushing in the plunger of a plugged-up syringe. (A and D): The plunger reduces the free volume in the syringe, so the pressure goes up, so it would involve both pressure and volume changes. I'm not sure I understand what is being sought in answering this question.

3. Decreasing of lungs’ capacity to get air in deep sea level. (A): The pressure of the water will prevent the lungs from expanding. Again, this could also be considered a volume issue, but pressure is the driving force.

4. Hot air balloon in the sky. (B): The warm air in the balloon is less dense than the surrounding cool air, thus the balloon is buoyant.

5. Big party balloons for Asta’s birthday. (C), since more gas is added to make the balloons larger, and their volume also increases. But the pressure also increases. Again, I'm unclear as to just how the question should be answered.

I hope this helps, at least a little,

Bob