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A chemical system is sealed in a strong, rigid container at room temperature, and then heated vigorously. (a) State whether AU, q, and w of the system are positive, negative, or zero during the heating process. (b) Next, the container is cooled to its original tempera- ture. Determine the signs of AU, q, and w for the cool- ing process. (c) Designate heating as step 1 and cooling as step 2. Determine the signs of (AU1 + AU2), (q1 + 92), and (w1 + wz), if possible.

A chemical system is sealed in a strong, rigid container at room temperature, and then heated vigorously. (a) State whether AU, q, and w of the system are positive, negative, or zero during the heating process. (b) Next, the container is cooled to its original tempera- ture. Determine the signs of AU, q, and w for the cool- ing process. (c) Designate heating as step 1 and cooling as step 2. Determine the signs of (AU1 + AU2), (q1 + 92), and (w1 + wz), if possible.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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A chemical system is sealed in a strong, rigid container at room temperature, and then heated vigorously. (a) State whether AU, q, and w of the system are positive, negative, or zero during the heating process. (b) Next, the container is cooled to its original tempera- ture. Determine the signs of AU, q, and w for the cool- ing process. (c) Designate heating as step 1 and cooling as step 2. Determine the signs of (AU1 + AU2), (q1 + 92), and (w1 + wz), if possible.
Transcribed Image Text:A chemical system is sealed in a strong, rigid container at room temperature, and then heated vigorously. (a) State whether AU, q, and w of the system are positive, negative, or zero during the heating process. (b) Next, the container is cooled to its original tempera- ture. Determine the signs of AU, q, and w for the cool- ing process. (c) Designate heating as step 1 and cooling as step 2. Determine the signs of (AU1 + AU2), (q1 + 92), and (w1 + wz), if possible.
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