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its temperature dependent
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Significance of joule Thomson effect?
It is an experiment in which the Joule-Thomson coefficient is measured. Basically, you are expanding a gas under adiabatic conditions to ensure constant enthalpy and you will notice that there will be a temperature change (most likely cooling).
Why does the can of dust off get cold?
Joule-Thomson effectAlso known as the Joule-Kelvin effect. When a Gas expands through a porous plug, a change of temperature occurs, proportional to the pressure difference across the plug. The temperature change is due to a departure of the gas from Joule's Law, the gas performing internal work in overcoming the mutual attractions of the Molecules and thus cooling itself; and partly to deviation of the gas from Boyles law. The latter effect can give rise to either to cooling or heating, depending upon the initial temperature and pressure difference used. For a given mean pressure, the temperature at which the two effects balance, resulting in no alteration of temperature, is called the inversion temperature. Gases expanding through a porous plug below their inversion temperature are cooled, otherwise they are heated.
When a gas expands to a region of low pressure what happen to its temperature?
The temperature drops. When a real (non ideal) gas expands ( in such a way that it does not take in heat from the environment- so called adiabatic) for example when hot air rises into a low pressure region the gas will cools. Real gases when they expand freely cool, this is the basis of the refrigerator (Joule Thomson effect). The explanation is that the separation of gas molecules involves "work" done against intermolecular forces which leads to a reductio in the kinetic of the molecules, hence the observed temperature.
Correct units to determine specific heat?
Specific heat is the heat required to raise the temperature of a unit mass by one degree. It is measured by joules.
Which of the following units would be used in energy thermodynamics?
The unit is joule (J).
What are the applications of joule Thomson effect?
two application joule thomson 1. linde methode 2. liquiefied
Significance of joule Thomson effect?
It is an experiment in which the Joule-Thomson coefficient is measured. Basically, you are expanding a gas under adiabatic conditions to ensure constant enthalpy and you will notice that there will be a temperature change (most likely cooling).
What is the value of joule Thomson coefficient for Natural gas?
Joule-Thompson coefficient for methane
How joule Thomson experiment lead to coefficient?
He did nothing
Why do hydrogen and helium get having very low temperatures warmed up instead of cooling in joule-thomson method?
There is for every gas a point called the inversion temperature. Above this temperature, the gas exhibits a reverse Joule-Thompson effect and warms on expansion instead of cooling. The inversion temperatures for hydrogen and helium are quite low compared to those of most other gases.
What are the applications of Thomson effects?
two application joule thomson 1. linde methode 2. liquiefied
When a real gas undergoes joule Thomson expansion how does the temperature react?
if all other factors remain constant (pressure and moles) then the temperature goes up proportionately. (assuming the ideal gas law.)
What is Thompson experiment?
It is an experiment in which the Joule-Thomson coefficient is measured. Basically, you are expanding a gas under adiabatic conditions to ensure constant enthalpy and you will notice that there will be a temperature change (most likely cooling).
How do you calculate joule kelvin inversion temperature of hydrogen?
use the T=2a/(bk) equation shown in the first link, plugging in a and b values found in the second link. proofs are shown in the joule-thomson expansion wikipedia page as well as the van der waals equation of state page.
What is the difference betwween heat energy and temperature?
Heat is the cause and temperature is the effect Heat = mass x specific heat capacity x temperature Heat is proportional to temperature and in not equal to temperature. Heat has joule as unit where as temperature has the unit kelvin
Is joule used on temperature scales?
No. A joule is a unit of energy within the SI system.
Why does the can of dust off get cold?
Joule-Thomson effectAlso known as the Joule-Kelvin effect. When a Gas expands through a porous plug, a change of temperature occurs, proportional to the pressure difference across the plug. The temperature change is due to a departure of the gas from Joule's Law, the gas performing internal work in overcoming the mutual attractions of the Molecules and thus cooling itself; and partly to deviation of the gas from Boyles law. The latter effect can give rise to either to cooling or heating, depending upon the initial temperature and pressure difference used. For a given mean pressure, the temperature at which the two effects balance, resulting in no alteration of temperature, is called the inversion temperature. Gases expanding through a porous plug below their inversion temperature are cooled, otherwise they are heated.
