MACROSCALE+MICRO.ORG...-OWLV2 ACCESS
7th Edition
ISBN: 9781305884175
Author: Williamson
Publisher: CENGAGE L
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Chapter 2, Problem 3Q
Interpretation Introduction
Interpretation:
The statement '' water not used to extinguish most fires in an organic laboratory" should be explained. Also, the safety issues with the given scenario should be explained.
Concept introduction:
The interaction of water and organic compounds makes them unusable as a fire control measure in an organic laboratory. Organic compounds are generally lighter than water and thus float on water. When water is used as a control measure to put out fire the fire is spread due to the flow of water.
An organic laboratory is guided to follow a set of precautious measures which helps in reducing the risks of accident breakout. These measures include use proper disposal and aeration of labs.
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111
States of Matter
Understanding conceptual components of the enthalpy of solution
0/5
Ge
A small amount of acetonitrile (CH, CN) is dissolved in a large amount of water. Imagine separating this process into the four stages sketched below. (These
sketches show only a portion of the substances, so you can see the density and distribution of atoms and molecules in them.)
CH,CN
H₂O
B
88
C
Use these sketches to answer the questions in the table below.
The enthalpy of solution AH is negative
soln
when CH3CN dissolves in water. Use this
information to list the stages in order of increasing
enthalpy.
Would heat be absorbed or released if the system
moved from Stage C to D?
What force would oppose or favor the system
moving from Stage C to D? Check all that apply.
1
absorbed
O released
neither absorbed nor released.
none
O ionic bonding force
covalent bonding force…
In a system with an anodic overpotential, the variation of ŋ as a function of
the current density:
1. at low fields is linear 2. at higher fields, it follows Tafel's law
Find the range of current densities for which the overpotential has the same
value as when calculated for cases 1 and 2 (maximum relative difference of
5% with respect to the behavior for higher fields). To which overpotential
range does this correspond?
Data: 10 = 1.5 mA cm², T = 300°C, ẞ = 0.64, R = 8.314 J K 1 mol¹ and F = 96485
C mol-1.
Indicate 10.6 with only one significant figure.
Chapter 2 Solutions
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