The graph shown below is the hypothetical heating curve showing the temperature of 1 mol of a substance versus the amount of heat energy added to said substance. 120. 110. Temp (C) 100 T: 90. 80. 2 70- 222222 60 50. 40. 30. 10. A B 0 10 20 30 Heat Input (kJ) a) Which line segment(s) correspond to the gas phase of the substance? DA ов □ C b) Which line segment(s) correspond to phase changes? DA Ов c) At what temperature does the substance boil? C OC D OD OD E e) Using the graph, approximate the molar enthalpy of fusion of the substance. ΔΗ 90 100 DE DE °C d) Using the figure, approximate the molar heat capacity of the substance in the liquid phase in kJ mol¹ C¹ Express your answer to 2 decimal places. kJ mol C kJ/1
The graph shown below is the hypothetical heating curve showing the temperature of 1 mol of a substance versus the amount of heat energy added to said substance. 120. 110. Temp (C) 100 T: 90. 80. 2 70- 222222 60 50. 40. 30. 10. A B 0 10 20 30 Heat Input (kJ) a) Which line segment(s) correspond to the gas phase of the substance? DA ов □ C b) Which line segment(s) correspond to phase changes? DA Ов c) At what temperature does the substance boil? C OC D OD OD E e) Using the graph, approximate the molar enthalpy of fusion of the substance. ΔΗ 90 100 DE DE °C d) Using the figure, approximate the molar heat capacity of the substance in the liquid phase in kJ mol¹ C¹ Express your answer to 2 decimal places. kJ mol C kJ/1
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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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
please do all the questions and please complete it.
Transcribed Image Text:The graph shown below is the hypothetical heating curve showing the temperature of 1 mol of a substance versus the
amount of heat energy added to said substance.
Temp (°C)
T:
2882232920
120
C:
110.
100
AH:
70
60
50
40
10-
A
b) which line segment(s) correspond to phase changes?
□ A
ов
c) At what temperature does the substance boil?
0.
0 10 20 30 40 50 60
Heat Input (kJ)
a) which line segment(s) correspond to the gas phase of the substance?
□ A
Ов
OC
B
C
Dc
с
D
70 80 90 100
OD
OD
E
e) Using the graph, approximate the molar enthalpy of fusion of the substance.
DE
d) Using the figure, approximate the molar heat capacity of the substance in the liquid phase in kJ mol¹ C¹Express
your answer to 2 decimal places.
□
E
kJ mol¹ C-1
kJ/1
Transcribed Image Text:Use the phase diagram for a pure unknown substance shown here to answer each of the questions below:
Pressure (atm)
T
P
10³
10²
T
10¹
P
10⁰
10-1
102
a) What phase will the unknown substance be in at SATP?
Solid
Liquid
10³
O Gas
b) At what pressure and temperature does the triple point occur in this unknown substance?
100
150 200 250 300 350
Temperature (K)
c) At what pressure and temperature does the unknown substance become a supercritical fluid?
к
K
atm
d) If the substance is heated at a constant pressure of 0.50 atm from 200 K to 300 K, the substance will change from the
choose state
state to the choose state
state.
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