lecture1 - Course Outline 1) 2) 3) 4) 5) Molecules and...

Info iconThis preview shows pages 1–15. Sign up to view the full content.

View Full Document Right Arrow Icon
Course Outline 1) Molecules and Their Energies, a Brief Overview . 2) The 1st Law of Thermodynamics — Conservation of Energy. 3) The 2nd Law of Thermodynamics — Ever-Increasing Entropy . 4) Equilibrium in Aqueous Solution — Putting it All Together 5) The Rates of Biological Processes — Quantifying the Changes We will learn about 1) MOLECULES to understand 2) HEAT ENERGY stored, to then understand 3) TOTAL ENERGY , from which we can predict 4) EQUILIBRIA and then finally 5) REAL PROCESSES . Read: R. Chang, chapter 2 and 3
Background image of page 1

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

View Full DocumentRight Arrow Icon
Our Progress in the Course 1) Molecules and their Energies, a Brief Overview a) Molecular definitions (origins) of Temperature and Pressure. b) P,V,T, and ‘ideal’ gas laws: interacting molecules in the gas phase d) Gas Kinetic Theory e) Kinetic Energy and Temperature f) Speed Distribution g) Non-ideal Gases Our future goals: Energy and The First Law of Thermodynamics . READ CHAPTERS 2, 3
Background image of page 2
Gas Law and Kinetic Theory Phenomena Qualitative description Quantitative statements Experimental testable Prediction Ideal Gas Law (macroscopic) Gas Kinetic Theory (microscopic)
Background image of page 3

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

View Full DocumentRight Arrow Icon
Gas laws Definitions the first thing to keep track of is HOW we DEFINE the SYSTEM the SYSTEM is what we’re trying to care about, measure, or predict real systems are in contact with some sort of SURROUNDINGS about which we don’t care as much (and usually complicates things)
Background image of page 4
Gas laws It matters greatly whether or not MASS can leave or enter the system, or whether HEAT can enter or leave the system OPEN CLOSED ISOLATED RC Fig 2.1
Background image of page 5

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

View Full DocumentRight Arrow Icon
Gas laws this distinction is important for MASS and ENERGY CONSERVATION OPEN systems allow CLOSED systems ISOLATED systems MASS and ENERGY allow only ENERGY allow NO flow (eg: not flow (eg: most cells) (some membranes) much, unfortunately) OPEN CLOSED ISOLATED
Background image of page 6
R.C. fig 2.2 What does this LOOK like? At each PRESSUE there’s an equilibrium VOLUME (keeping Temperature const) change this PRESSURE ? Then the volume re-adjusts Gas Laws Ideal gases Boyle’s law
Background image of page 7

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

View Full DocumentRight Arrow Icon
Charles’ and Gay-Lussac’s law Gas Laws Ideal gases T = -273.15 C
Background image of page 8
What does this LOOK like? If we increase the TEMPERATURE now, we get a family of PV curves We can also plot this in 3-d… Gas Laws
Background image of page 9

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

View Full DocumentRight Arrow Icon
We can combine the P-V, V-T, and P-T 2-d plots to a 3-d surface : P vs. V V vs T Gas Laws
Background image of page 10
What does this LOOK like in 3-d? We have a SURFACE of all possible allowed combinations of Pressure, Volume, and Temperature this surface tells us what to expect from the 3rd variable if we change the other two (a point) It also can tell us what to expect from 2 variables if we fix 1 (a line) Gas Laws
Background image of page 11

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

View Full DocumentRight Arrow Icon
Avogadro’s law Gas Laws Ideal gases V vs. n
Background image of page 12
PV = nRT What is the unit of R (gas constant, same for every gas)? R = 0.082 L·atm·mol -1 ·K -1 = 8.314 J·mol -1 ·K -1 = 1.987 cal·mol -1 ·K -1 Gas Laws Ideal Gas Equation : It is an equation of state
Background image of page 13

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

View Full DocumentRight Arrow Icon
If a 10 m water column exerts a 1atm.
Background image of page 14
Image of page 15
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 69

lecture1 - Course Outline 1) 2) 3) 4) 5) Molecules and...

This preview shows document pages 1 - 15. Sign up to view the full document.

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