Inert Gas Heating
Inert Gas Heating - Related Videos
08:21
Permeabilization of Adhered Cells Using an Inert Gas Jet
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Cited by 3 •
2013
This protocol describes a method for the temporary permeabilization of adherent cells using an inert gas jet. This technique facilitates the transfer of genetic material and biomolecules into adherent mammalian cells by the utilization of mechanical forces to disrupt the plasma membrane.
01:14
Heat Capacities of an Ideal Gas I
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2023
Heat capacity is the ratio of heat absorbed by the substance corresponding to its temperature change. It is also called thermal capacity and the SI unit of heat capacity is J/K. Whereas, specific heat capacity is defined as the amount of heat necessary to change the temperature of 1 kg of a substance by 1 K and is also called massic heat capacity. Its SI unit is J/kg⋅K. Molar heat capacity quantifies the ratio of the amount of heat added (or removed) to increase (or decrease) the temperature of...
01:23
Heat Capacities of an Ideal Gas II
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2023
For a system that undergoes a thermodynamic process at a constant volume condition, the heat absorbed is used only to increase the system's internal energy and not for doing any kind of work. While for a system undergoing a thermodynamic process under a constant pressure condition, the amount of heat absorbed is used not only for increasing the internal energy (as a function of temperature) but also for doing some work. The molar heat capacity is the amount of heat required to increase the...
01:25
Heat Capacities of an Ideal Gas III
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2023
The number of independent ways a gas molecule can move along straight line, rotate, and vibrate is called its degrees of freedom. Supposing d represents the number of degrees of freedom of an ideal gas, the molar heat capacity at constant volume of an ideal gas in terms of d is The molar heat capacity at constant pressure can also be written in terms of d using the relationship between the two heat capacities. Thus, The ratio of molar heat capacity at constant pressure over that at constant...
09:22
Gas Chromatography (GC) with Flame-Ionization Detection
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Gas chromatography (GC) is used to separate and detect small molecular weight compounds in the gas phase. The sample is either a gas or a liquid that is vaporized in the injection port. Typically, the compounds analyzed are less than 1,000 Da, because it is difficult to vaporize larger compounds. GC is popular for environmental monitoring and industrial applications because it is very reliable and can be run nearly continuously.
FAQs
Removing oxygen and moisture reduces opportunities for oxidation, combustion, and moisture-sensitive degradation while the sample is heated. The unreactive gas occupies the surrounding atmosphere, so the substance is exposed to fewer chemically reactive species than it would be in ordinary air. This helps preserve composition and makes observed thermal changes more representative of the intended heating conditions.
Nitrogen and argon serve as examples of chemically unreactive gases that can replace oxygen- and moisture-containing air around a sample. Their role is environmental control rather than direct participation in the reaction or thermal process. By maintaining this less reactive atmosphere, the heating system can limit unwanted chemical changes that would complicate synthesis, drying, or thermal measurements.
Gas flow displaces reactive gases from the heating region, while controlled pressure helps maintain the specified atmosphere around the sample. These conditions must remain consistent as temperature changes, because incomplete displacement or unstable pressure can allow oxygen or moisture to re-enter the system. Controlling both variables supports reproducible treatment and more reliable interpretation of thermal behavior.
A furnace, heating mantle, or tube system can provide the thermal input, provided the setup supports a controlled gas environment. The equipment raises the sample to a specified temperature while the gas system manages the surrounding atmosphere. Selecting and operating the appropriate arrangement allows researchers to match the heating configuration to synthesis, drying, thermal analysis, or materials-processing requirements.
A typical workflow places the substance in a compatible heating system, introduces the selected inert gas to displace reactive gases, and establishes controlled flow and pressure before heating. The apparatus then raises the sample to the specified temperature while maintaining the atmosphere. After treatment, researchers can examine the preserved material or record its thermal response under defined conditions.
This approach is useful when heating could cause oxidation, combustion, or degradation through contact with oxygen or moisture. Chemists may apply it during chemical synthesis, drying, thermal analysis, and materials processing. Maintaining a controlled atmosphere protects sample composition and improves reproducibility, allowing results to reflect the selected temperature and gas conditions rather than uncontrolled reactions with air.