Thermochemistry is the application of thermodynamics to
chemical systems. This field of study is particularly concerned
with the heat effects that accompany chemical reactions, the
formation and dilution of solutions, and phase changes.
Def'n: Newton (N): the force that will accelerate a mass of 1 kg at 1.0 m.s-2
Gravity (g): 9.81 m.s-2
Pascal (Pa): 1 Pa = 1 N acting over an area of 1 m2
therefore, the force of gravity on 1 kg will be 9.81 N
so, 1 Newton i
CHEM 14B-2 YOUR NAME
Instructor: Dr. Laurence Lavelle |D# ............................. ..
CLASS TEST 1
(Total points = 40)
(Total time = 40 mins)
YOUR DISCUSSION SECTION .................................... ..
YOUR TA ...................
Although Alchemy speaks through allegories, it cannot be understood by the symbolists, because
Alchemy is not a cryptography to decipher, but a gift from God, as its adepts state.
We know today the "modus operandi" of this millenarian science that is able
Solving Percentage Problems by Dimensional Analysis
Once one understands problem solving by dimensional analysis (factor label) it is straightforward to
solve percentage problems using conversion factors.
1. To calculate a percentage use the equation
Significant Figures in Calculations
Measurements always have some uncertainty. The degree of uncertainty can be expressed with the
measured value, for example, 16.2 0.05 cm. This would indicate that the measurement is about
16.2 cm, but certainly not more
Solving Word Problems by Dimensional Analysis
Problem: 1 ream of paper (500 sheets) is 1.45 in thick. How many sheets are in a 2.50 in thick stack of paper?
Step A: Rewrite the question in the form
_ = ? _
The item after the ? should answer the question h