No credit if work is not shown. Show all steps involved. Substitute in equations along with units. Report final answers with appropriate units and round off to appropriate # sig. figs. 1) A chemical reaction is performed in a flask that is connected to a piston. Heat is allowed to enter or escape this system, but matter cannot. The reaction absorbs 890 J of heat from the surroundings and the gas produced pushes the piston upward against a constant external pressure of 1.5 atm so that the volume of gas changes from 0.95 L to 2.5 L (a) Determine the values of q and w (in Joules) along with the sign. 1 L-atm = 101.3 J The piston is pushed upward. (b) Determine the values of AH and AE values for this reaction. (Hint: Write the equation for AE in terms of heat and work. Hint for AH: This is a constant pressure system. At constant pressure, AH =
No credit if work is not shown. Show all steps involved. Substitute in equations along with units. Report final answers with appropriate units and round off to appropriate # sig. figs. 1) A chemical reaction is performed in a flask that is connected to a piston. Heat is allowed to enter or escape this system, but matter cannot. The reaction absorbs 890 J of heat from the surroundings and the gas produced pushes the piston upward against a constant external pressure of 1.5 atm so that the volume of gas changes from 0.95 L to 2.5 L (a) Determine the values of q and w (in Joules) along with the sign. 1 L-atm = 101.3 J The piston is pushed upward. (b) Determine the values of AH and AE values for this reaction. (Hint: Write the equation for AE in terms of heat and work. Hint for AH: This is a constant pressure system. At constant pressure, AH =
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter12: Thermodynamic Processes And Thermochemistry
Section: Chapter Questions
Problem 42P
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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
A2
Transcribed Image Text:No credit if work is not shown. Show all steps involved. Substitute in equations along with
units. Report final answers with appropriate units and round off to appropriate # sig. figs.
1) A chemical reaction is performed in a flask that is connected to a piston. Heat is
allowed to enter or escape this system, but matter cannot. The reaction absorbs 890 J
of heat from the surroundings and the gas produced pushes the piston upward against
a constant external pressure of 1.5 atm so that the volume of gas changes from 0.95 L
to 2.5 L
(a) Determine the values of q and w (in Joules) along with the sign.
1 L-atm = 101.3 J
The piston is
pushed upward.
(b) Determine the values of AH and AE values for this reaction.
(Hint: Write the equation for AE in terms of heat and work.
Hint for AH: This is a constant pressure system. At constant pressure, AH =
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