Consider the combustion of propane: C3 Hs (g) + 502(g) → 3CO2(g) + 4H2O(1) AH = -2221 kJ A balloon is being inflated to its full extent by heating the air inside it. In the final stages of this process, the volume of the balloon changes from 4.00 × 10° L to 4.50 × 10° L by the addition of 1.6 × 10® J energy as heat. Assume that all the heat comes from the combustion of propane. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 60.% efficient? Mass = g Submit Answer Try Another Version 3 item attempts remaining
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.
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Consider the combustion of
propane:
СзHs (9) + 502(9) — ЗСО%(9) + 4H20(1) ДН %— — 2221 kJ
A balloon is being inflated to its full extent by heating the air inside it. In the final stages of this process, the volume of the balloon changes
from 4.00 x 10° L to 4.50 x 10° L by the addition of 1.6 x 10° J energy as heat. Assume that all the heat comes from the combustion of
propane. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 60.% efficient?
Mass =
g
Submit Answer
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