An ideal gas with molar heat capacity at constant volume, Cy,m = 3/2R undergoes a reversible isothermal expansion at 300 K until the pressure is half of its initial value with Pex = 0.500 bar and Tsur = 300 K. The ideal gas is with initial temperature, Ti = 300 K and initial pressure, P; = 1.00 bar. a) Identify the change in internal energy (AU) (in unit kJ mol*) and change in enthalpy (AH) (in unit kJ mol4). b) Calculate work done (w) (in unit kJ). c) Identify heat change (q) (in unit kJ).

An ideal gas with molar heat capacity at constant volume, Cy,m = 3/2R undergoes a reversible isothermal expansion at 300 K until the pressure is half of its initial value with Pex = 0.500 bar and Tsur = 300 K. The ideal gas is with initial temperature, Ti = 300 K and initial pressure, P; = 1.00 bar. a) Identify the change in internal energy (AU) (in unit kJ mol*) and change in enthalpy (AH) (in unit kJ mol4). b) Calculate work done (w) (in unit kJ). c) Identify heat change (q) (in unit kJ).

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

An ideal gas with molar heat capacity at constant volume, Cy,m = 3/2R undergoes a reversible
isothermal expansion at 300 K until the pressure is half of its initial value with Pex = 0.500 bar
and Tsur = 300 K. The ideal gas is with initial temperature, Ti = 300 K and initial pressure, P; =
1.00 bar.
a) Identify the change in internal energy (AU) (in unit kJ mol*) and change in enthalpy (AH)
(in unit kJ mol4).
b) Calculate work done (w) (in unit kJ).
c) Identify heat change (q) (in unit kJ).
d) Calculate the change in entropy for the system (ASsys) and change in entropy of the
surrounding (ASaur). Identify the change in total entropy (AStot). The unit of the change in
entropy is J K1.
e) State whether the process is spontaneous, not spontaneous or equilibrium.

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