Lecture 35 - Lecture 35 pls-35.1 Thermodynamic Processes /...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 35 pls-35.1 Thermodynamic Processes / P-V Diagrams Media: 1. Plungers with paper Clicker questions 1 - 2 1. Thermodynamic Processes Last time: (A) Isochoric (constant V) (B) Isobaric (constant P) (C) Isothermal Process (constant T) 1 st law: W Q U = T Nk U B 2 3 = Æ Q W = 0 > W (expansion) Æ 0 > Q (heat flows in) 0 < W (compression) Æ 0 < Q (heat flows out) freely moving piston (no friction) gas constant T water bath thin diathermal wall remove weight, let gas push piston up 0 because T = 0
Background image of page 1

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

View Full DocumentRight Arrow Icon
Lecture 35 pls-35.2 For an isothermal process T Nk PV B = is constant Æ f f i i V P V P = (D) Adiabatic Process (Q = 0) 1 st law: W Q U = T Nk U B 2 3 = Æ U W = T Nk B = 2 3 , for an ideal monatomic gas (IMG) 0 > W (expansion) Æ 0 < ∆Τ (gas cools) 0 < W (compression) Æ 0 > T (gas heats up) Demo : Plungers with paper Can show (with some calculus) for an IMG that 3 5 PV is constant Æ 3 5 3 5 f f i i V P V P = Note, for other ideal gases replace 3 5 by γ V P c c .
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/26/2012 for the course PHY 1020 taught by Professor Kodera during the Fall '11 term at University of Florida.

Page1 / 5

Lecture 35 - Lecture 35 pls-35.1 Thermodynamic Processes /...

This preview shows document pages 1 - 3. Sign up to view the full document.

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