General Formula:

Equation 1:

Equation 2:

Popp= opposing pressure

Pext = external pressure

Equation 2 - Work done by a gas doing expansion or compression against an opposing pressure.

Properties of W:

1.

- inexact differential:

meaning less symbol since work is a path function.

2.

integrates to a finite SUM

3.

4. Sign convention:

+, W> 0; dV< 0 (Vf- -, W< 0; dV> 0 (Vf>Vi); expansion, W is done by the system

Above are such a heavy concept to internalize because my excitement is on the Valentine's Day ideas for girls and women that my collegues are planning to spend this 2010 valentine's day celebration. I am so excited with that coming celebration because it will be a dual celebration, a valentine's day and a chinese new year. I should give myself a break on that day to treat myself after all the hard work being a student, a mom, a wife, and a teacher this early year of 2010.

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