Why is the heat of fusion (AH) of a substance smaller than its heat of vaporization (AH,ap)? Why is the heat of sublimation (AH) of a substance greater than its heat of vaporization(AH,ap)? Add the heats of fusion and vaporization. Compare this number with the heat of sublimation. Why do you notice? Explain this.
Why is the heat of fusion (AH) of a substance smaller than its heat of vaporization (AH,ap)? Why is the heat of sublimation (AH) of a substance greater than its heat of vaporization(AH,ap)? Add the heats of fusion and vaporization. Compare this number with the heat of sublimation. Why do you notice? Explain this.
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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Transcribed Image Text:Under specific conditions of temperature and pressure, two phases can be in dynamic
equilibrium with each other – where the particles can interconvert between the two phases
- just as one molecule goes from liquid to gas, simultaneously another particle goes from
gas to liquid.
fusion
H;O(s)
AH = 6.01 kJ
at 0.00 °C and 1 atm:
H;O()
crystallization
vaporization
at 100.00 °C and 1 atm:
H;O(1)
H;O(g)
AH = 40.7 kJ
condensation
sublimation
at 0.00 °C and 1 atm:
H;O(s)
H;O(g)
AHab = 46.7 kJ
Why is the heat of fusion (AH») of a substance smaller than its heat of vaporization (AH,9p)?
Why is the heat of sublimation (AH) of a substance greater than its heat of
vaporization(AH,p)?
Add the heats of fusion and vaporization. Compare this number with the heat of
sublimation. Why do you notice? Explain this.
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