slide1
Download
Skip this Video
Download Presentation
Thermal & Kinetic Lecture 22 Problems Class II

Loading in 2 Seconds...

play fullscreen
1 / 24

Thermal & Kinetic Lecture 22 Problems Class II - PowerPoint PPT Presentation


  • 89 Views
  • Uploaded on

Thermal & Kinetic Lecture 22 Problems Class II. Thermal & Kinetic paper, ’04/’05: Q1. Is it possible for the temperature of an ideal gas to rise without heat flowing into the gas?. Yes No Don’t know.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Thermal & Kinetic Lecture 22 Problems Class II' - rana-hanson


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Thermal & Kinetic

Lecture 22

Problems Class II

is it possible for the temperature of an ideal gas to rise without heat flowing into the gas
Is it possible for the temperature of an ideal gas to rise without heat flowing into the gas?
  • Yes
  • No
  • Don’t know
must the temperature of an ideal gas necessarily change as a result of hear flow into or out of it
Must the temperature of an ideal gas necessarily change as a result of hear flow into or out of it?
  • Yes
  • No
  • Don’t know
slide6

…compare to CW Set 4

  • Q1. 1 mole of an ideal gas originally at a pressure of 1.0 x 104 Pa and occupying a volume of 0.2 m3 undergoes the following cyclic process:
  • an adiabatic compression until the pressure is 3.0 x 104 Pa;
  • an isobaric expansion to a volume of 0.4 m3;
  • an isothermal expansion until the pressure reaches 1.0 x 104 Pa;
  • an isobaric compression to the original volume of 0.2 m3.
  • Draw a PV diagram for this process [3].
  • For each of the stages (i) – (iv) calculate the heat transferred [5], the work done [5], and the change in internal energy [5].
  • Show that only internal energy is a function of state [2].
what do you need to use to solve this type of pv cycle question
What do you need to use to solve this type of PV cycle question?
  • Ideal gas law: PV = nRT
  • First law: DU = Q + W
  • Equation for adiabatic, P1V1g = P2V2g
  • Equation for adiabatic work:
  • Q = CvDT (isochoric);
  • Q = CPDT (isobaric)
  • Work done in isothermal, isobaric, isochoric process
  • Only internal energy is a function of state
slide10
Numerical answers to all (past!) exam questions are on web at:

http://www.nottingham.ac.uk/physics/intranet/undergrad/ug_numericalanswers.php

what is the net change in internal energy of the gas for one cycle of the engine
What is the net change in internal energy of the gas for one cycle of the engine?
  • 0 J
  • 90 J
  • 180 J
  • 60 J
  • Don’t know
when moving from point a to point b what is the change in the volume of the gas
When moving from point A to point B, what is the change in the volume of the gas?
  • 90 m3
  • 2 m3
  • 45 m3
  • 32 m3
  • Don’t know
dimensions of boltzmann s constant
Dimensions of Boltzmann’s constant?
  • M2L2 T2Q
  • M2L2 T2Q-1
  • M2LT-1Q-1
  • ML2 T-2Q-1
  • Don’t know
slide16

If the energy levels are spaced by 0.25 eV and the number of molecules with energy E1 is a factor of 10-5 smaller than the number with energy E0, calculate the value of T.

  • 101 K
  • 2112 K
  • 273 K
  • 252 K
  • None of these
  • Don’t know
slide19
What is the probability of finding the system in a state where each oscillator has one quantum of energy?
  • 50%
  • 8%
  • 10%
  • 1%
  • Don’t know
total energy of configuration b
Total energy of configuration B?
  • e
  • 2e
  • 4e
  • 5e
  • Don‘t know
what is the equilbrium temperature of the system
What is the equilbrium temperature of the system?
  • 100 C
  • 50 C
  • Neither of these
  • Don’t know
will the total change in entropy be
Will the total change in entropy be:
  • Positive
  • Negative
  • Zero
  • Don’t know
ad