Write and simplify the general energy balance for each of the following processes. Begin by defining the system as closed or open, then writing the appropriate form of the general energy balance. Cancel out negligible terms and indicate what keyword/assumptions allows the term to be assumed negligible. State whether heat and work terms are positive or negative or zero. a. The contents of an agitated, sealed flask are heated from 25°C to 80 °C.. b. An exothermic chemical reaction takes place in a closed, perfectly insulated, rigid container. c. Repeat part (b), only suppose that the reactor is isothermal rather than perfectly insulated. d. Water is pumped from the bottom of a well 20 m below the ground through a 2-cm ID pipe, through the water heater and to your shower 1 m above the ground. The shower head has a cross-sectional area of 1 cm².

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
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2. Write and simplify the general energy balance for each of the following processes. Begin by
defining the system as closed or open, then writing the appropriate form of the general energy
balance. Cancel out negligible terms and indicate what keyword/assumptions allows the term
to be assumed negligible. State whether heat and work terms are positive or negative or zero.
a. The contents of an agitated, sealed flask are heated from 25°C to 80 °C..
b. An exothermic chemical reaction takes place in a closed, perfectly insulated, rigid
container.
d.
c. Repeat part (b), only suppose that the reactor is isothermal rather than perfectly insulated.
Water is pumped from the bottom of a well 20 m below the ground through a 2-cm ID
pipe, through the water heater and to your shower 1 m above the ground. The shower
head has a cross-sectional area of 1 cm².
Transcribed Image Text:2. Write and simplify the general energy balance for each of the following processes. Begin by defining the system as closed or open, then writing the appropriate form of the general energy balance. Cancel out negligible terms and indicate what keyword/assumptions allows the term to be assumed negligible. State whether heat and work terms are positive or negative or zero. a. The contents of an agitated, sealed flask are heated from 25°C to 80 °C.. b. An exothermic chemical reaction takes place in a closed, perfectly insulated, rigid container. d. c. Repeat part (b), only suppose that the reactor is isothermal rather than perfectly insulated. Water is pumped from the bottom of a well 20 m below the ground through a 2-cm ID pipe, through the water heater and to your shower 1 m above the ground. The shower head has a cross-sectional area of 1 cm².
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