Ammonia is a refrigerant with the formula NH₂. Use the information the table below to determine ow many grams ofammonia must be vaporized in order to absorb enough energy to cool 275.0 grams of ethanol from 50.0°C to 22.0°C?gramssubstanceEthanolWaterDMSOt-ButanolAmmoniaFreon-12R12B1formulaC₂H5OHH₂OC₂H6SOC4H10ONH3CC1₂F2CF₂CIBrm.p.°Cm.w.g/mol46.069 -114.078.018.0150.0100.078.129 19.0189.074.123 25.282.417.03 -77.7 -33.33120.9-158.0-29.75165.36-159.5-4.01b.p°CAHfus ΔΗvapkJ/mol kJ/mol5.0238.66.0140.6714.448.66.7839.123.3520.0922.37Specific Heat CapacityLiquidJ/g °C2.304.1841.962.9SolidJ/g.°C0.9702.091.801.97GasJ/g.°C1.941.841.201.732.170.6120.451

Mass of ethanol(m) = 275.0 gInitial temperature(Ti) = 50.0oCFinal temperature(Tf) = 22.0oCspecific heat capacity(c) = 2.30 J/goC for ethanolEnthalpy of vaporization = 23.35 kJ/mol for ammoniaWhen ethanol cools down, it releases energy from it. Hence, the heat release for ethanol isThe relation between enthalpy and heat is given asRearrange the formula for n and solve for itThe molar mass of ammonia is 17.03 g/mol. Hence, the mass of ammonia required isThe mass of ammonia vaporized is 12.9 g of ammonia.

Science

Chemistry

Ammonia is a refrigerant with the formula NH₂. Use the information in the table below to determine ow many grams of ammonia must be vaporized in order to absorb enough energy to cool 275.0 grams of ethanol from 50.0°C to 22.0°C? grams

Ammonia is a refrigerant with the formula NH₂. Use the information in the table below to determine ow many grams of ammonia must be vaporized in order to absorb enough energy to cool 275.0 grams of ethanol from 50.0°C to 22.0°C? grams

Chemistry

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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 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.

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Question

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Ammonia is a refrigerant with the formula NH₂. Use the information the table below to determine ow many grams of
ammonia must be vaporized in order to absorb enough energy to cool 275.0 grams of ethanol from 50.0°C to 22.0°C?
grams
substance
Ethanol
Water
DMSO
t-Butanol
Ammonia
Freon-12
R12B1
formula
C₂H5OH
H₂O
C₂H6SO
C4H10O
NH3
CC1₂F2
CF₂CIBr
m.p.
°C
m.w.
g/mol
46.069 -114.0
78.0
18.015
0.0
100.0
78.129 19.0
189.0
74.123 25.2
82.4
17.03 -77.7 -33.33
120.9
-158.0
-29.75
165.36
-159.5
-4.01
b.p
°C
AHfus ΔΗvap
kJ/mol kJ/mol
5.02
38.6
6.01
40.67
14.4
48.6
6.78
39.1
23.35
20.09
22.37
Specific Heat Capacity
Liquid
J/g °C
2.30
4.184
1.96
2.9
Solid
J/g.°C
0.970
2.09
1.80
1.97
Gas
J/g.°C
1.94
1.84
1.20
1.73
2.17
0.612
0.451

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