CH3OH is added to reaction container CH4(g) +H2O(1) ² CH;OH(1) +H2(g) H2(g) + I2(g) = 2HI(g) an inert gas is added 2H2 (g) + O2 (g) = 2H2O (g) AH =-483.6 kJ/mol of O2 increase in temperature
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.
![3. What will be the effect of the following change on the given equilibrium system?
system
change
result
CH3OH is added to
CH(g) +H-0(1) — CH,ОН(1) +H-(g)
reaction container
H2(g) + I2(g) = 2HI(g)
an inert gas is added
2H2 (g) + O2 (g)= 2H2O (g)
AH =-483.6 kJ/mol of O2
increase in temperature
SnO2(g) + 2C(s)= Sn(s) + 2CO2(g)
Pressure is decreased
AH =+ 360.0 KJ
N2(g) + 3 H2(g)=2 NH3(g)
AH = -92 kJ mol-1
the solution is cooled
some AgNO3 is added
to the solution
AgCl(s) = Ag*(aq) + C(aq)
N2(g) + 3 H2(g) = 2 NH3(g)
pressure is increased](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F38c269a6-21a0-44b3-aa2d-62704163a378%2Fea2568ba-22e8-4e94-8df0-0d45e1675b13%2Fgicx90w_processed.png&w=3840&q=75)
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