4. - An important reaction in the production of sulfuric acid is the formation of sulfur trioxide gas. 2SO2 (g) + 02 (g) 2SO3 (g) A) Using the AH; values to calculate the enthalpy change for the reaction. Is the reaction endothermic or exothermic? B) What quantity of thermal energy (heat) is transferred when 40.0 g of SO2 and 50.0 g of O2 react? C) Using the information from (b) determine the volume of SO3 gas obtained at STP.
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.
![4. F An important reaction in the production of sulfuric acid is the formation of sulfur trioxide gas.
2S02 (g) + O2 (g)
2SO3 (g)
A) Using the AH; values to calculate the enthalpy change for the reaction. Is the reaction
endothermic or exothermic?
B) What quantity of thermal energy (heat) is transferred when 40.0 g of SO2 and 50.0 g of O2
react?
C) Using the information from (b) determine the volume of SO3 gas obtained at STP.
D) Using the information from (b) what is the actual yield of SO3 in grams if the percent of yield
of the reaction is only 85.0%?
E) For a different experiment, determine the volume of air necessary for the combustion of 40.0 g of
SO2, assuming that air is 21.0% O2 by volume?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1f295d57-6ae4-4b1f-bf51-90536590266e%2F0f0ada45-6bc7-44d3-a374-8e4725ae6d2c%2F60byhwf_processed.png&w=3840&q=75)
![Enthalpies of formation, kJ/mol at 25°C, 1 atm:
Al,O3(s)
-1675.7
CO(g)
-110.5
NH3(g)
-46.11
B2H,(g)
36
CO2(g)
-393.5
NHẠNO3(s)
-365.6
-1272.8
-272.0
82.05
B2O3(s)
FeO(s)
N20(g)
-558
Fe,O3(s)
-824.2
90.25
BaQ(s)
NO(g)
-1473
135
33.18
BaSO4(s)
HCN(g)
NO2(g)
-74.81
-241.8
-411.1
H2O(g)
CH4(g)
NaCl(s)
-135.4
-285.9
573.64
CCL4(E)
H2O({)
Nal(s)
-132
-291.9
-287.8
H,O(s)
SO2(g)
CHC13(t)
226.7
-92.31
-296.8
52.26
HC/(g)
-20.6
SO3(g)
-395.7
CH2(g)
-84.68
H,S(g)
62.43
SiO2(s)
-903.5
CH4(g)
49.03
I(g)
50.63
SİH4(g)
C,H,(g)
N,H4(E)
CgH,(t)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1f295d57-6ae4-4b1f-bf51-90536590266e%2F0f0ada45-6bc7-44d3-a374-8e4725ae6d2c%2Fg8mdegg_processed.png&w=3840&q=75)
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