A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is agraph of the results:140.120.temperature (°C) 100.80.I Don't Know60.0.What is the melting point of X?Use this graph to answer the following questions:10.What phase (physical state) of X wouldyou expect to find in the flask after5 kJ/mol of heat has been added?Submit80heat added (kJ/mol)20.8880°C(check all that apply)solidliquidgas30.X540.DIIFB© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | AccessibilF9F10?Solo

Answered: A pure solid sample of Substance X is…

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...

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A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a
graph of the results:
140.
120.
temperature (°C) 100.
80.
I Don't Know
60.
0.
What is the melting point of X?
Use this graph to answer the following questions:
10.
What phase (physical state) of X would
you expect to find in the flask after
5 kJ/mol of heat has been added?
Submit
80
heat added (kJ/mol)
20.
888
0°C
(check all that apply)
solid
liquid
gas
30.
X
5
40.
DII
FB
© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibil
F9
F10
?
S
olo

Expert Solution

Step 1: Concept of heat

The solid substance, X, changes to liquid first and then the liquid changes its phase to gas as the heat is added.

Solid -> liquid -> gas

The first phase change in the graph is from solid to liquid and the second phase change is from liquid to gas.

Heat supplied to the substance is being consumed during the phase change process and keeps the temperature where it is, for any substance the temperature stays constant during the change of state.

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