Name: Macroscopic and Microscopic Variables
Uploaded: 2019-07-19
Duration: 5 min 3 s
Description: This video enables students to understand the definition and examples of the macroscopic and microscopic variables of the thermodynamic system.

Question

Explain in detail the isothermal process.

Accepted Answer

Meaning of 'Thermal' is a term that explains the heat of a system. 'Iso' means 'equal', 'isothermal' means 'equal heat', that is what defines thermal equilibrium. Isothermal process is one in which the temperature remains the same. For example, there is a constant set of changes taking place in the mechanics of a refrigerator but the end result is that the temp inside remains constant.
The benefit of working at a constant temperature and with an ideal gas is that we can use Boyle’s law and the ideal gas law to communicate pressure and volume. Both of these expressions (as Boyle’s law is one of the several laws that were incorporated into the ideal gas law) show an inverse relationship between pressure and volume. Boyle’s law implies that:
P₁V₁ = P₂V₂
PV=nRT
Here, n is the number of moles of the gas,
R is the universal gas constant and
T is the temperature.
With a fixed amount of gas and a fixed temperature, PV must take a constant value.

Explain in detail the isothermal process.

Important Questions on Heat and Thermodynamics

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