4. Use tabulated bond energies to estimate the enthalpy of reaction for each of the following gas phase reactions. a. N₂ + 3H₂ → 2NH3 b. CO + H2O > CO2 + H2 5. Assuming that the gases are ideal, calculate the amount of work done (in joules) in the following reaction. Is the work done on or by the system? Consider the oxidation of one mole of HCl(g) at 200°C. 4HCl(g) + O₂(g) 2Cl₂(g) + 2H₂O(g) 6. Use data in Appendix K to find the enthalpy (AHº), entropy (AS°), and AG° of reaction for the following. Indicate whether the reaction is spontaneous or non-spontaneous. a. NH4NO3(s) → N₂O(g) + 2H₂O(1)
4. Use tabulated bond energies to estimate the enthalpy of reaction for each of the following gas phase reactions. a. N₂ + 3H₂ → 2NH3 b. CO + H2O > CO2 + H2 5. Assuming that the gases are ideal, calculate the amount of work done (in joules) in the following reaction. Is the work done on or by the system? Consider the oxidation of one mole of HCl(g) at 200°C. 4HCl(g) + O₂(g) 2Cl₂(g) + 2H₂O(g) 6. Use data in Appendix K to find the enthalpy (AHº), entropy (AS°), and AG° of reaction for the following. Indicate whether the reaction is spontaneous or non-spontaneous. a. NH4NO3(s) → N₂O(g) + 2H₂O(1)
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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.132QP
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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
Transcribed Image Text:4. Use tabulated bond energies to estimate the enthalpy of reaction for each of the
following gas phase reactions.
a. N₂ + 3H₂ → 2NH3
b. CO + H2O > CO2 + H2
5. Assuming that the gases are ideal, calculate the amount of work done (in joules) in the
following reaction. Is the work done on or by the system? Consider the oxidation of one
mole of HCI(g) at 200°C.
4HCl(g) + O₂(g) → 2Cl₂(g) + 2H₂O(g)
6. Use data in Appendix K to find the enthalpy (AHº), entropy (AS°), and AG° of reaction for
the following. Indicate whether the reaction is spontaneous or non-spontaneous.
a. NH4NO3(s) → N₂O(g) + 2H₂O(l)
b.
SiO2 (s) + 3C(graphite) → SiC(s) + 2CO(g)
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