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GAS PV" = C = const. As shown above is a piston-cylinder arrangement. Although not indicated, there may be latches that can be found to lock or unlock the movement of the piston. Consider a situation wherein a gas with initial pressure of 7 bar (1 bar = 1 kPa) and initial volume of 0.1 m³ is confined in a cylinder. The piston is held in place by latches in the cylinder wall. The whole apparatus ( the thermodynamic system is the gas, piston and the cylinder) is placed in air at atmospheric pressure of 102.75 kPa. If the restraining latches are removed so that the gas suddenly expands to triple its initial volume. The piston strikes the other latches at the end of the process that will eventually held the piston in place and will not move. Assume the rate of heat exchange between the apparatus and the surrounding air is slow ( here Q is zero) compared with the rate at which the process occurs. The energy change ( the work done by the system is pushing back the atmosphere) in kJ is O 20.55 -20.55 -10.13 O 10.13

GAS PV" = C = const. As shown above is a piston-cylinder arrangement. Although not indicated, there may be latches that can be found to lock or unlock the movement of the piston. Consider a situation wherein a gas with initial pressure of 7 bar (1 bar = 1 kPa) and initial volume of 0.1 m³ is confined in a cylinder. The piston is held in place by latches in the cylinder wall. The whole apparatus ( the thermodynamic system is the gas, piston and the cylinder) is placed in air at atmospheric pressure of 102.75 kPa. If the restraining latches are removed so that the gas suddenly expands to triple its initial volume. The piston strikes the other latches at the end of the process that will eventually held the piston in place and will not move. Assume the rate of heat exchange between the apparatus and the surrounding air is slow ( here Q is zero) compared with the rate at which the process occurs. The energy change ( the work done by the system is pushing back the atmosphere) in kJ is O 20.55 -20.55 -10.13 O 10.13

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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GAS PV" =C = const. As shown above is a piston-cylinder arrangement. Although not indicated, there may be latches that can be found to lock or unlock the movement of the piston. Consider a situation wherein a gas with initial pressure of 7 bar (1 bar = 1 kPa) and initial volume of 0.1 m³ is confined in a cylinder. The piston is held in place by latches in the cylinder wall. The whole apparatus ( the thermodynamic system is the gas, piston and the cylinder) is placed in air at atmospheric pressure of 102.75 kPa. If the restraining latches are removed so that the gas suddenly expands to triple its initial volume. The piston strikes the other latches at the end of the process that will eventually held the piston in place and will not move. Assume the rate of heat exchange between the apparatus and the surrounding air is slow ( here Q is zero) compared with the rate at which the process occurs. The energy change ( the work done by the system is pushing back the atmosphere) in kJ is 20.55 -20.55 -10.13 10.13
Transcribed Image Text:GAS PV" =C = const. As shown above is a piston-cylinder arrangement. Although not indicated, there may be latches that can be found to lock or unlock the movement of the piston. Consider a situation wherein a gas with initial pressure of 7 bar (1 bar = 1 kPa) and initial volume of 0.1 m³ is confined in a cylinder. The piston is held in place by latches in the cylinder wall. The whole apparatus ( the thermodynamic system is the gas, piston and the cylinder) is placed in air at atmospheric pressure of 102.75 kPa. If the restraining latches are removed so that the gas suddenly expands to triple its initial volume. The piston strikes the other latches at the end of the process that will eventually held the piston in place and will not move. Assume the rate of heat exchange between the apparatus and the surrounding air is slow ( here Q is zero) compared with the rate at which the process occurs. The energy change ( the work done by the system is pushing back the atmosphere) in kJ is 20.55 -20.55 -10.13 10.13
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