Quiz 1-solutions (1)

# Quiz 1-solutions (1) - Version 235 Quiz 1 laude(51635 This...

This preview shows pages 1–2. Sign up to view the full content.

Version 235 – Quiz 1 – laude – (51635) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Constants R = 8 . 314 J · K 1 · mol 1 Equations ln parenleftbigg P 2 P 1 parenrightbigg = Δ H R parenleftbigg 1 T 1 - 1 T 2 parenrightbigg Π = MRT Δ T b = iK b m Δ T f = iK f m P i = P i χ i P = summationdisplay i P i q = mc Δ T q = m Δ H 001 5.0points Assuming standard pressure, what physical constants are needed to calculate the change in enthalpy for raising a sample of water from 250 K to 300 K. I) the heat capacity of ice II) the enthalpy of fusion of water III) the heat capacity of water IV) the enthalpy of vaporization of water V) the heat capacity of steam 1. III, IV, V 2. III, V 3. V 4. II, IV 5. I, II, III, IV, V 6. I, III 7. III 8. I, II and III correct Explanation: The heat capacity of ice is necessary to calculate heat needed to raise the liquid wa- ter’s temperature from 250 K to 273 K. The enthalpy of fusion of water is necessary to cal- culate the heat needed to convert 10 grams of water at 273 K to 10 grams of liquid water at 273 K. Finally, the heat capacity of water is necessary to calculate heat needed to raise the liquid water’s temperature from 273 K to 300 K. 002 5.0points Rank the following by their miscibility in C 10 H 22 (decane), from least miscible to most: H 2 O (water), C 9 H 20 (nonane), CH 3 OH (methanol), CH 3 CH 2 OH (ethanol).

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the 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