5. How much heat is released when 12.59 of ethanol burns? C2H5OH + 302 → 2CO2 + 3H20 AH = - 1368kJ 6. How does the molar heat of fusion of a substance compare to its molar heat of solidification?
5. How much heat is released when 12.59 of ethanol burns? C2H5OH + 302 → 2CO2 + 3H20 AH = - 1368kJ 6. How does the molar heat of fusion of a substance compare to its molar heat of solidification?
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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number 5 and 6 only
Transcribed Image Text:12:29
30
GENERAL C.Ctivity sheet
General Chemistry 2 Module 4
Performance Task:
I.
Create a summary of Topic: Thermochemistry (refer to the ppt).
Key indicators to be checked: Terminologies, Key points, Formula.
II.
Answer the following.
1. In what direction does heat flow between two objects?
2. How do endothermic processes differ from exothermic processes?
3. On what factors does the heat capacity of an object depend?
4. Using calories, calculate how much heat 32.0g of water absorbs when it is heated
from 25°C to 80°C. How many joules is this? Cp water= 4.2 J/g°C
5. How much heat is released when 12.59 of ethanol burns?
C2H5OH + 3O2 → 2C02 + 3 H20
AH = - 1368kJ
6. How does the molar heat of fusion of a substance compare to its molar heat of
solidification?
7. How does the molar heat of vaporization of a substance compare to its molar heat
of condensation?
8. Identify each enthalpy change by name and classify each change as exothermic or
endothermic.
a.
I mol C3H2) → I mol C3Ha(9)
b.
I mol Hg) → I mol Hg(s)
C.
I mol NH3(9) →→ I mol NH3)
d.
I mol Naclis) + 3.88KJ/mol →> I mol NaCliag)
I mol NaClis) → I mol NaCl
e.
1/2
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