Question

answer asap please A sealed balloon is filled with air at atmospheric pressure (P = 1.01...

answer asap please

A sealed balloon is filled with air at atmospheric pressure (P = 1.01 X 105 Pa) at 30°C (typical conditions for the surface o
3 pts. - d) The average molar mass of air molecules is M = 28.97 g moll. What is the average kinetic energy of air molecules
A sealed balloon is filled with air at atmospheric pressure (P = 1.01 X 105 Pa) at 30°C (typical conditions for the surface of the Earth in St. Thomas). You take the (sealed) balloon with you on top of Mountain Top, which has an elevation of about 450m, where the average air pressure is 9.6 x 109 Pa. The temperature at the top is 26°C, a bit cooler. 2.5 pts. - a) How big is the balloon on top of the mountain (top) compared to its size at sea level (V...)? Express your answer as the ratio Vto/sea 2 pts. - b) The average human breath takes in about 500 cm of air. Calculate the number of moles of air in a breath at sea level on St. Thomas at 30°C. 3 pts. - c) Calculate the number of moles of air in a breath at Mountain Top on St. Thomas at 26°C.
3 pts. - d) The average molar mass of air molecules is M = 28.97 g moll. What is the average kinetic energy of air molecules at sea level in St. Thomas? 3 pts. - e) You seal 5 mol of air in a container that cannot change volume. You heat those molecules from 26°C to 100°C, how much heat would you need to provide? You can assume that all air molecules are composed by 2 atoms.
0 0
Add a comment Improve this question
Answer #1

Sign Up to Unlock the answer FREE

Already have an account? Log in

From gas laws

\frac{P_{1}V_{1}}{T_{1}}=\frac{P_{2}V_{2}}{T_{2}}

\frac{P_{1}T_{2}}{P_{2}T_{1}}=\frac{V_{2}}{V_{1}}

\frac{V_{2}}{V_{1}}=1.038

b)

we know PV=nRT

R = 0.082057 L-atm /mol K

putting P= 1 atm and T= 303 K

we get

n= 0.0201 moles

c)

now P = 0.95 atm

T =299 K

we get n= 0.0193

d)

We from from kinetic theory of gases

K.E= 3/2nRT

where K.E is kinetic energy

so K.E = 1.5 X 8.314 X 303

= 3778.713 J/mol

e)

for process under constant volume

molar heat capacity = Cv

given the gas is diatomic so Cv =5/2 R

now Q= nCv\Delta T

Q=7690.45 J

Add a comment
Know the answer?
Add Answer to:
answer asap please A sealed balloon is filled with air at atmospheric pressure (P = 1.01...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT