7. When nitromethane, CH3NO2 (molecular mass = 61.05 g/mol) is burned the following reaction occurs: 2CH3NO2(1) + O2(g) → 2CO2(g) + N2(g) + 3H₂O(g) Given the following information: AH CO₂(g) = -393.5 kJ/mol AHF 3H₂O(g) = -241.8 kJ/mol AH CH3NO2(1) = 112.0 kJ/mol a. Calculate AH for the burning of 1 mole of nitromethane. b. Is the reaction exothermic or endothermic? heat released! What is AH when 18.02g H₂O(g) is formed in the above ronction
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.
![8.
C(s) + O2(g) → CO₂(g)
a.
2H2(g) + O2(g) → 2H₂O(l)
7. When nitromethane, CH3NO2 (molecular mass = 61.05 g/mol) is burned the following reaction occurs:
2CH3NO2(1) + O2(g) → 2CO2(g) + N2(g) + 3H₂O(g)
Given the following information:
AHF CO₂(g) = -393.5 kJ/mol
AHF 3H₂O(g) = -241.8 kJ/mol
AH CH3NO2(I) = 112.0 kJ/mol
Calculate AH for the burning of 1 mole of nitromethane.
b. Is the reaction exothermic or endothermic? heat released
What is AH when 18.02g H₂O (g) is formed in the above reaction.
C.
Without doing any calculations determine th
AH = -393.5 KJ
AH-571.6 kJ](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F50de52e1-7d33-4b3c-a050-8482f7f33c6d%2F5ca04a3e-abfd-4943-8b7c-69bdd9bde3a4%2Fojbhbme_processed.jpeg&w=3840&q=75)
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