Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
Related questions
Question
How much energy was transferred during the phase change shown on the cooling curve? Use the phase diagram and table of values below to help you answer the question

Transcribed Image Text:Water
Alcohol
Heat of Vaporization, H (J/g)
2,260
841
vap
Heat of Fusion, H, (J/g)
334
109
Specific Heat Capacity of the Liquid, c
(J/g•K)
4.18
2.46

Transcribed Image Text:1. In an experiment, a closed container holds a 10.0 g sample of an alcohol. The
container is cooled at a constant rate. The sample's temperature is recorded each
minute. A graph of the data is below. A phase diagram for the alcohol is also
shown.
COOLING CURVE FOR AN
PHASE DIAGRAM OF AN ALCOHOL
ALCOHOL
y
62
500
liquid
solid
400
1.00
300
200
4.2 x 10-9
100
gas
0-
10
15
Time (min)
150 159
351 514
Temperature (K) (not to scale)
Temperature (K)
20
Pressure (atm) (not to scale)
Expert Solution

Step 1
According to question
We have been asked the energy change,
given mass of alcohol = 10g
Melting point = 159 k
BOILING point = 351k
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