The complete combustion of propane, C3H8(g), is represented by the equation: C3H8(g) + 5 02(8) → 3 CO2(8) + 4 H20(1) AH =-2220 k Calculate the enthalpy (AH) and internal energy (AU), in kl, when 20.0L C3H8(g) reacts with excess oxygen at STP.

The complete combustion of propane, C3H8(g), is represented by the equation: C3H8(g) + 5 02(8) → 3 CO2(8) + 4 H20(1) AH =-2220 k Calculate the enthalpy (AH) and internal energy (AU), in kl, when 20.0L C3H8(g) reacts with excess oxygen at STP.

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter2: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 2.28E: The distance between downtown San Francisco and downtown Oakland is 9 miles. However, a car driving...

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Concept explainers

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.

Question

(16 points)
The complete combustion of propane, C3H8(g), is represented by the equation:
C3H8(g) + 5 02(8) → 3 CO2(8) + 4 H20(1)
AH = -2220 k
Calculate the enthalpy (AH) and internal energy (AU), in kl, when 20.0L C3H8(g) reacts with excess oxygen at
STP.

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