Question

OPEN-ENDED PROBLEMS: to receive credit, you need to show calculations Problem 1 (1 pressure. Neon has a molar specific heat of 20.79 J/mol-K for a constant-pressure process 0 points): Two moles of neon gas is heated from 300 K to 420 K at constant a) (3 points) Calculate the energy Q transferred to the gas; b) (2 points) Calculate the change in the internal energy of the gas; c) (3 points) Calculate the work done on the gas during this process. d) (2 points) Draw a sketch of PV-diagram for this process (showing the shape of the graph is sufficient)
0 0
Add a comment Improve this question Transcribed image text
Answer #1

A.

For isobaric process,

energy transferred to the gas is given by:

Q = n*Cp*dT

n = number of moles = 2

Cp = Molar specific heat at constant pressure = 20.79 J/mol-K

dT = 420 - 300 = 120 K

So,

Q = 2*20.79*120 = 4989.6 J

Part B.

Change in internal energy is given by:

dU = n*Cv*dT

Cv = Cp - R = 20.79 - 8.314 = 12.476

So,

dU = 2*12.476*120 = 2994.24 J

Part C.

Using first law of thermodynamics

dQ = dU + W

W = dQ - dU

W = 4989.6 - 2994.24

W = 1995.36 J = Work-done on the gas

Part D.

at Contant Jprreszure

Add a comment
Know the answer?
Add Answer to:
OPEN-ENDED PROBLEMS: to receive credit, you need to show calculations Problem 1 (1 pressure. Neon has...
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
ADVERTISEMENT