CHEM 150
HOMEWORK #4
Due: Monday, 7/23/12
1. A sample of toothpaste was analyzed for its fluoride content by treating a 250 mg sample
with an ionic strength buffer to extract F- followed by dilution to 100.0 mL. The potential
reading with a fluoride ISE w
Quiz 1
Version B
Chapters 13 & 14
4/13/12
On the ParScore form you need to fill in your perm number, test version, and
name. Failure to do any of these things will result in the loss of 1 point.
Your perm number is placed and bubbled in under the ID numbe
CHEM 150
HOMEWORK #2 - Solutions
1. A 50.0 mL sample of vinegar (density = 1.06 g/mL) was diluted to 500.0 mL.
Titration of a 50.0 mL aliquot of this solution required 42.5 mL of 0.0900 M
NaOH to reach the end point. Determin the acid content of the vineg
CHEM 150
HOMEWORK #3
Solutions
1. Calculate the standard potential for the reaction
ZnCO3(s) + 2e-
=
Zn(s) + CO32-(aq)
for ZnCO3 having Ksp = 1.4 X 10-11.
E = -1.08 V
2. The following cell was found to have a potential of 0.512V:
Pt(s)H2 (l.00atm)HA (0.20
Chemistry 150
Quantitative Analysis
Final Exam (take home)
200 pts. possible
Rules: You may use the following materials: (1) your textbook; (2) your class notes; and
(3) any downloaded items from the course website. Please do your own work, no
collaborati
Chem 113A Homework #2
Due: Tues. 10/16/12
1. Calculate w for the adiabatic expansion of 1 mol of an ideal gas at an initial pressure of 2.00 bar from
an initial temperature of 450 K to a final temperature of 300 K. Write an expression for the work
done in
Chem 113A Homework #2 Solutions 1. Calculate w for the adiabatic expansion of 1 mol of an ideal gas at an initial pressure of 2.00 bar from an initial temperature of 450 K to a final temperature of 300 K. Write an expression for the work done in the isoth
Chemistry 113A Fall 2012
Lecture: TR 11AM 12:15PM
1171 Chemistry
Instructor: Prof. Steve Buratto
4148B Chemistry
buratto@chem.ucsb.edu
Office Hours: MTW 9:00 - 10:00 AM (or by appointment)
Course TAs: Hunter Neilson
hneilson@chem.ucsb.edu
Jack Love
jalove
Chem 113A Homework #1
Solutions
1. The total pressure of a mixture of oxygen and hydrogen is 1.00 atm. The mixture is ignited and the
water is removed. The remaining gas is pure hydrogen and exerts a pressure of 0.400 atm when
measured at the same values
Chem. 113A 2nd Midterm Exam November 29, 2012 Prof. Buratto
Solutions
problem 1
score Jack
2
Hunter
3
Jack
4
Prof. B
5
Hunter
6
Jack
7
Hunter
Useful Constants electron mass proton mass neutron mass atomic mass unit Planck's constant Boltzmann constant Avo
Physical Chemistry (I)
Quiz 02
Nov. 3, 2011
1. (10%)Derive the following expression for calculating the isothermal change in the
constant volume heat capacity:
Because dU = TdS PdV = CV dT + dV
Therefore
2. (10%) For an ideal gas, Prove that C V is indepe
We now have all of the background to calculate the work,
the heat, the change in internal energy U and the change in
enthalpy H for transformations in our model system (ideal
gas inside a piston).
Before doing an example we need to remember an
important
Physics 6A lecture 1 2011-01-04
1. H ow is it that by exerting a CONSTANT force on an object,
we have acceleration? If I m pushing a box and I keep that
force steady, why would the speed of the box increase? This
doesnt make sense to me conceptually.
2. T
or for infinitesimal changes
q = heat (discussed later) and w = work
we defined work when studying mechanics as
where
is the displacement against the opposing force
using our model system of an ideal gas inside a cylinder
with a movable piston, we calc
Physics 6A lecture 1 2011-01-04
Q4.8
A question for you:
1. Astronauts who are in orbit are still being acted on by gravity
because they stay in orbit. Why do they experience
weightlessness if gravity is still acting upon them?
A ball sits at rest on a ho
Chem 113A Homework #3 Due: Tues. 10/23/12
1. 1.75 moles of an ideal gas with CV,m = 3/2R is transformed from an initial state T = 750 K and P = 1.75 bar to a final state T = 350 K and P = 5.25 bar. Calculate U, H, and S for this process. 2. 1.85 moles of
The total differential dz written as
is exact iff (if and only if) their exists a function f(x,y) such that
and
the exact differential is then written as
Note: in thermodynamics the function z = f(x,y) is often
written z = z(x,y), and above differential i
Physics 6A lecture 1 2011-01-04
Friction
1. Why does the magnitude of static friction in the force
equation have an inequality sign?
Kinetic (sliding) friction:
opposes sliding
2. Does an object need to be in equilibrium to experience static
friction?
3.
nd
Where all the action is and where everything comes together!
nd
we introduce this subject by considering the following cyclic
transformation as a model for a heat engine (a Carnot cycle)
Reflections on the Motive Power of Fire (1824)
Sadi Carnot
cole P
KEY - 8 AM class
Physics 2 1st Midterm 1/31/2012 8 AM lecture
Name _
MULTIPLE-CHOICE QUESTIONS (60 points). For each of these 10 questions, bubble in
the one best answer on your Scantron form. Each correct multiple-choice answer is worth 6 points.
1. This
Chem. 113A 1st Midterm Exam October 25, 2012 Prof. Buratto
Solutions
problem 1
score Jack
2
Prof. B
3
Hunter
4
Hunter
5
Jack
6
Hunter
7
Jack
1. (15 pts.) A sample consisting of 3.0 mol of an ideal gas (CV,m = 1.5 R) initially at 298 K and 10.0 L, is expan
Physics 6A lecture 1 2011-01-04
Physics Mailbag
1. I came across a question in which a pail of water was whirled
at the end of a rope in a vertical circle. From experience, I
know that the water will not fall out of the pail if it is whirled
fast enough.
Physics 6A lecture 1 2011-01-04
Physics Mailbag
1. All of these problems seem to say ignore air resistance.
How would you factor in air resistance if you were asked to?
2. How do you nd the maximum height of a projectile?
3. In the online lecture, we igno
Physics 6A lecture 1 2011-01-04
Essentials
Roger Freedman
airboy@physics.ucsb.edu
Office hours:
3413 Broida Hall
Tuesdays and Thursdays 11:30-1:00
or by appointment
1. University Physics
13th edition with
MasteringPhysics
2. i>clicker2
remote transmitter
12 points
See the following page for the
grading scheme used for part (a)
23 points
See the
following
page for the
grading
scheme
used for
part (b)
Grading scheme for Problem 2