Isobaric Process
Isobaric Process - Related Videos
01:21
Isochoric and Isobaric Processes
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2023
A thermodynamic process that occurs at constant volume is called an isochoric process. According to the first law of thermodynamics, heat supplied or removed from the system is partially utilized to perform work and change the internal energy of the system. However, in an isochoric process, the volume remains constant. Hence, the work done by the system is zero. Therefore, the exchange of heat changes the internal energy of the system only. Suppose 1000 g of water is heated from 40 degrees...
09:06
Enhanced Sample Multiplexing of Tissues Using Combined Precursor Isotopic Labeling and Isobaric Tagging (cPILOT)
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Cited by 10 •
2017
Combined precursor isotopic labeling and isobaric tagging (cPILOT) is a quantitative proteomics strategy that enhances sample multiplexing capabilities of isobaric tags. This protocol describes the application of cPILOT to tissues from an Alzheimer's disease mouse model and wild-type controls.
06:13
Single-Cell Proteomics Preparation for Mass Spectrometry Analysis Using Freeze-Heat Lysis and an Isobaric Carrier
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Cited by 10 •
2022
In this protocol, we describe how to prepare mammalian cells for single-cell proteomics analysis via mass spectrometry using commercially available reagents and equipment, with options for both manual and automatic pipetting.
09:24
Automated Sample Multiplexing by using Combined Precursor Isotopic Labeling and Isobaric Tagging (cPILOT)
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Cited by 2 •
2020
Combined precursor isotopic labeling and isobaric tagging (cPILOT) is an enhanced sample multiplexing strategy that is capable of increasing the number of samples that can be analyzed simultaneously with available isobaric tags. Incorporation of a robotic platform has greatly increased experimental throughput, reproducibility, and quantitative accuracy.
01:29
Processes of Self-Presentation
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2025
Effective self-presentation is a central component of social interaction and identity construction. It relies on the dynamic processes of defining the situation and engaging in self-disclosure. These mechanisms help individuals navigate social context expectations and manage how others perceive them, fostering mutual understanding and relationship development.Defining the SituationSocial situations are shaped by collectively understood frames—a set of widely understood rules or conventions...
FAQs
Energy accounting in an isobaric process separates transferred heat into internal-energy change and pressure-volume work. The first law expresses this balance as Q = ΔU + W, where Q is heat supplied, ΔU is the change in internal energy, and W is work performed by the system. This framework shows why heating can change both microscopic energy and macroscopic volume.
For an ideal gas, constant pressure requires volume to vary proportionally with temperature. A temperature increase therefore corresponds to expansion, while a temperature decrease corresponds to contraction under the same pressure condition. This linked change in temperature and volume provides a direct way to analyze the gas state without treating pressure as an additional changing variable.
Heat transfer has two connected effects: it changes the system’s internal energy and can drive expansion or compression against the maintained pressure. During expansion, part of the supplied energy appears as pressure-volume work, while the remainder contributes to internal-energy change. This distinction helps explain why heat input does not necessarily produce an equal temperature change in every case.
Begin by confirming that pressure remains constant, then identify the initial and final temperatures and volumes. Use the ideal-gas relationship to connect the temperature and volume changes, calculate pressure-volume work from the volume change, and apply the first law to relate heat transfer to work and internal-energy change. This sequence keeps state changes and energy transfers consistent.
A piston provides a physical model in which a gas can change volume as its temperature changes while pressure is maintained. Heating the gas can produce expansion and mechanical work, whereas cooling can produce contraction. By observing temperature and volume together, an experiment can test their proportional relationship and connect the measured state change with energy transfer.
Isobaric analysis is useful when a system changes while its surrounding pressure remains the relevant constraint, including piston arrangements, open atmospheric systems, and controlled laboratory experiments. It allows researchers or students to track temperature, volume, heat, and work within one framework. The resulting energy balance supports comparisons with other thermodynamic conditions without losing sight of the pressure constraint.