Part 2 Your answer is incorrect. Use the values from the given table and the equation you chose in Part 1 to find the overall change in enthalpy for the reaction. i -7.950E1 Hint
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.
Need part 2
![Using the data in the table below, calculate AH° in kilojoules for the following reactions.
Standard Enthalpies of Formation of Typical Substances
Substance
AH: (KI mol-)
Substance
AH (KI mol-1)
Substance
AH; (KI mol-)
Substance
AH (k) mol-1)
NO(g)
Ag(s)
AgBr()
-187.6
CH(g)
-84.667
90.37
-100.4
HBr(g)
-36
CH,OH()
-277.63
NO:(g)
33.8
AgCl(s)
- 127.0
HCI(g)
Ca(s)
N,0(g)
N2Og)
N;O(g)
-92.30
81.57
AlG)
-682.8
HI(g)
HNO,()
26.6
CaBr,()
9.67
- 1669.8
Al,O,()
C) (graphite)
CaCO,()
CaCl()
-173.2
- 1207
11
H,SO,)
-811.32
-795.0
Na(s)
CO(g)
-110.5
HC,H,0,)
-487.0
-635.5
NaHCO,()
-947.7
CO:(g)
-393.5
Ca(OH),G)
Na,CO,()
Hg(/)
Hg(g)
-986.59
-1131
- 1432.7
- 1575.2
CH(g)
-74.848
60.84
CaSO()
NaCI(s)
-411.0
CH,CI(g)
CHI(g)
CH,OH()
CaSO,H,0()
CaSO, 2H,0G)
-82.0
NaOH()
-426.8
14.2
K(s)
- 2021.1
Na,SO,G)
- 1384.5
-238.6
KCI(s)
-435.89
Ch(g)
O:(g)
CO(NH,),() (urea)
-333.19
K,SO,()
-1433.7
Fe(s)
Pb(s)
CO(NH),(ag)
-391.2
N2(g)
Fe,O,6)
-822.2
-219.2
CH(g)
226.75
NH,(g)
-46.19
SG)
H;(g)
H,O(g)
C,H.(g)
52.284
NH,CI()
-315.4
-241.8
SO,()
-296.9
H,O()
-285.9
so,(g)
-395.2
(a) 2H2O2(1)
2H20(1) + O2(g)
(b) HCI(g) + NaOH(s)
NaCI(s) + H2O(1)
Part 1
Your answer is correct.
For reaction (a) 2H2O2(1)
2H20(1) + O2(3), what is the equation for the change in enthalpy of this reaction?
[AH;°(O2(s)] - [AHf°(H2O2(1)) + AH;°(H20(1)]
[2ΔΗ(Hο() + ΔΗ?(Ο,9)] - [2ΔΗ' (H2O,()]
[AH;°(H2O2(1)) + AH;°(H2O(1) - [AH;°(O2(3)]
[2AH;°(H2O2(1))] - [2AH;°(H20(1)) + AHF°(O2(g))]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb1ca4019-f596-47d0-9ac7-d83eaf834e41%2F425d818a-6b95-4f8f-9800-d63078c03938%2F08bupc_processed.png&w=3840&q=75)
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