Nitroglycerin, a very unstable compound (molecular structure shown below), is a liquid at room temperature. When heated to 218.0°C or subjected to shock, it rapidly decomposes into four different gases. Liquid nitroglycerin has a density of approximately 1.60 g/mL. The nitroglycerin decomposition reaction equation is: 4 C3H5N3O9 (1)→ 12 CO₂ (g) + 10 H₂O(g) + 6 N₂(g) + O₂(g) Assume that when heated to 218.0°C, 1.00 lb of nitroglycerin explodes heating the product gases to 750.0°C. Determine the total gas volume, in L, produced by the explosion. Assume that the pressure generated by the explosion is 7.50 atm. H₂C-O ngh H₂C-CH nitroglycerin O
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.
It is given that when nitroglycerin is heated at , it gets decomposed to produce 4 different gases.
The decomposition reaction for nitroglycerin is given as follows:
Mass of nitroglycerin explodes is given as .
The total pressure of the gases produced after explosion is given as .
When nitroglycerin explodes to produce 4 different gases then temperature changes to .
The relationship between temperature in degrees Celsius and temperature in Kelvin is given by an expression:
Converting in Kelvin.
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