{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ef152-rec-6-5

ef152-rec-6-5 - on the gas(c What is the change in internal...

This preview shows page 1. Sign up to view the full content.

EF 152 – Physics for Engineers Spring, 2009 Recitation 6.5 Review 1. What is the average kinetic energy per molecule of a gas at room temperature, 293K? If the gas is O 2 , what is the rms speed? 2. One mole of helium is in contact with a thermal reservoir at 350K is under 10 atm of pressure. The pressure is slowly increased to 25 atm. (a) What are the initial and final volumes of the gas? (b) How much work is done by the gas? (c) What is the change in internal energy of the gas? (d) What is the heat flow into the gas? 3. One mole of helium is in contact with a thermal reservoir at 350K is under 10 atm of pressure. The pressure is rapidly increased to 25 atm. (a) What are the initial and final volumes of the gas? (b) How much work is done
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: on the gas? (c) What is the change in internal energy of the gas? (d) What is the heat flow into the gas? 4. Book problem Chapter 18, Problem 47. Challenge: Work this problem with only the given temperature and pressures. You should not have to actually calculate other temperatures, pressures, or volumes. 5. In order to make an ice cube from water, a refrigerator must extract 1400 cal of heat at the temperature of the freezer, -12°C. The room temperature is 30°C. What minimum work must an ideal refrigerator do? 6. Calculate the change in entropy of 2 kg of water when it is heated from liquid water at 60°C to steam at 100°C....
View Full Document

{[ snackBarMessage ]}

What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern