Mr. Rogers' AP Physics C: IB Physics Topics Syllabus 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter IB SL Thermo IB HL Thermo IB HL Waves AP Review

Topic 9: HL Thermal Physics (SL optional) - Thermodynamic Processes
 1st Law 2nd Law Processes Heat Engines HL Equations

Isobaric - constant pressure

An isobaric process requires a large amount of heat input. The process is a suitable model for the fuel injection portion of a Diesel cycle.

W = ∫ P(v) dv  or area under the curve

W = P1 (v2 - v1)

Isothermal - constant temperature

An isothermal process requires a moderate amount of heat input. This process is found in the idealized Carnot cycle.

For a perfect gas:

Pv = nRT

P = nRT/v

W = ∫ P(v) dv

= ∫ nRT/v dv   integrate from v1 to v2

W  = nRT ln|v2/v1|

The compression and expansion cycles of internal combustion, piston-driven engines occur so fast that they are considered adiabatic. Essentially there is not enough time for heat transfer.

Since no heat is transferred in, adiabatic expansions do less work than an isothermal expansion with the same starting conditions and ending volume.

Isochoric - constant volume

An isochoric process cannot do work since there is no change in volume.

Mr

Mr. Rogers Teacher's Blog

Southside High School Physics Club

Mr. Rogers T-shirts

Mr. Rogers Information for Teachers

Check out other web sites created by Mr. R:

• what makes Star Trek unique
• how Star Trek compares to Star Wars
• why the star ship Enterprise needs to remain in space
• what should and shouldn't be done in space battles
• what it takes to blast off and travel the galaxy
• the basics of orbiting
Insultingly Stupid Movie Physics is one of the most humorous, entertaining, and readable physics books available, yet is filled with all kinds of useful content and clear explanations for high school, 1st semester college physics students, and film buffs.

It explains all 3 of Newton's laws, the 1st and 2nd laws of thermodynamics, momentum, energy, gravity, circular motion and a host of other topics all through the lens of Hollywood movies using Star Trek and numerous other films.

If you want to learn how to think physics and have a lot of fun in the process, this is the book for you!

 First the web site, now the book!

Mr. Rogers Home | Common Sylabus | AP Comp Sci I | AP Comp Sci II | AP Physics Mech | AP Physics E&M | AP Statistics | IB Design Tech | Southside

[ Intuitor Home | Physics | Movie Physics | Chess | Forchess | Hex | Intuitor Store |