Calculate the total enthalpy in kJ of a 0.564 g sample of steam at 100oC going through various phase change steps to become ice at 0oC. Molar mass for H2O is 18.015 g/mol

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Calculate the total enthalpy in kJ of a 0.564 g sample of steam at 100oC going through various phase change steps to become ice at 0oC. Molar mass for H2O is 18.015 g/mol.

+200
Heat liberated
5
+150
4 Boiling
+100
STEAM
(100 –200°C)
3
LIQUID WATER (0 –100°C)
+50
Melting
2
1
ICE (-50 – 0°C)
Heat absorbed
- 50
200
400
600
800
1000
1200
1400
1600
Heat (kJ)
Temperature (°C)
Transcribed Image Text:+200 Heat liberated 5 +150 4 Boiling +100 STEAM (100 –200°C) 3 LIQUID WATER (0 –100°C) +50 Melting 2 1 ICE (-50 – 0°C) Heat absorbed - 50 200 400 600 800 1000 1200 1400 1600 Heat (kJ) Temperature (°C)
Use the following data for your calculations:
Table 1 9.2
•..
Specific heat and molar heat capacities for some common substances 4
Molar Heat Capacity, C,
(J mol 1 K ')
Specific Heat, c
Substance
(J 8'K ')
Al(s)
0.900
24.3
Cu(s)
0.385
24.5
H,O(s)
2.09
37.7
H,O({)
4.18
75.3
H,O(g)
2.03
36.4
Table 1 9.3
•..
Standard molar enthalpies and temperatures for phase changes of water
Phase
Change
Fusion
Freezing
Vaporization
Condensation
Transition
0°C
0°C
100°C
100°C
Temperature
AH (J/mol)
ΔΗ
6009.5
ΔΗ
AHfus
AHfreeze =
-6009.5
AHcond =
-4.07 × 10*
vap
4.07 × 10*
Transcribed Image Text:Use the following data for your calculations: Table 1 9.2 •.. Specific heat and molar heat capacities for some common substances 4 Molar Heat Capacity, C, (J mol 1 K ') Specific Heat, c Substance (J 8'K ') Al(s) 0.900 24.3 Cu(s) 0.385 24.5 H,O(s) 2.09 37.7 H,O({) 4.18 75.3 H,O(g) 2.03 36.4 Table 1 9.3 •.. Standard molar enthalpies and temperatures for phase changes of water Phase Change Fusion Freezing Vaporization Condensation Transition 0°C 0°C 100°C 100°C Temperature AH (J/mol) ΔΗ 6009.5 ΔΗ AHfus AHfreeze = -6009.5 AHcond = -4.07 × 10* vap 4.07 × 10*
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