Question

A cylinder with a movable piston 115cm³ air at 8°. If thepressure is kept constant, at what temperature would you expect the volume to be 80 cm³?

Answer 1

Answer:

8p

1

+

r

24σ

]

Initial pressure P

1

for bubble radius r compression pressure P

2

. Surface Tension σ.

Pressure gradient will be constant.

P

1

V

1

=P

2

V

2

Apply Bernoulli'sTheorem

⇒(P

1

+

r

4σ

)(

3

4

πr

3

))=(P

2

+

r/2

4σ

)(

3

4

π

8

r

3

)

⇒8P

1

+

r

32σ

=P

2

+

r

8σ

⇒P

2

=8P

1

+

r

24σ