PHY7AW10practice-q7

PHY7AW10practice-q7 - 3. Two substances, one a gas and the...

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

View Full Document Right Arrow Icon
1. Add to the attached graph the appropriate curves for a second substance with the following properties: 50 atoms, E b = -350 x 10 -21 J, T(s l)=75K, | Δ H(s l)|=50 x 10 -21 J, T(l g)=200K, | Δ H(l g)|=200 x 10 -21 J. This second substance forms a diatomic gas with its vibrational modes frozen out. Draw your graph as accurately as possible by calculating points first. Label clearly. 7A 2C Quiz 7 DL Sec. ____ Name _____________________ __________________ last first for office use only I certify by my signature that I will abide by the code of academic conduct of the University of California. Signature _____________________________ Formulas: Eth/mode = (1/2)k B T; C = Q/ Δ T = (1/2)k B (#modes)(#atoms); k B = 1.38 x 10 -23 J/K
Background image of page 1

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

View Full DocumentRight Arrow Icon
2. How many atoms comprise the sample whose properties are plotted in the attached graph, and how do you know this? Refer to the attached graph, and note that it is not the same as the one from problem 1.
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 3. Two substances, one a gas and the other a liquid, are initially at the same temperature, but are contained in two sepa-rate, rigid, thermally insulated containers. If 1.7 kJ of energy is added to each container, will the change in the ther-mal energy for the gas be greater than, equal to or less than the change in Eth for the liquid? The addition of this en-ergy does not cause a phase change in either substance. If you think you dont have sufficient information to answer, what specific additional information would you need? 7A 2C Quiz 7 DL Sec. ____ Name ________________________ __________________ last first Formulas: Eth/mode = (1/2)k B T; C = Q/ T = (1/2)k B (#modes)(#atoms); k B = 1.38 x 10-23 J/K...
View Full Document

Page1 / 2

PHY7AW10practice-q7 - 3. Two substances, one a gas and the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online