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In thermodynamics, the key difference between an adiabatic and isothermal graph is how heat is transferred. In an adiabatic process, there is no heat exchange with the surroundings, while in an isothermal process, the temperature remains constant throughout the process.

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Q: What are the key differences between an adiabatic and isothermal graph in thermodynamics?
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What are the key differences between adiabatic and isothermal processes on a PV diagram?

In an adiabatic process, there is no heat exchange with the surroundings, leading to steeper slopes on a PV diagram compared to an isothermal process where temperature remains constant. This results in different shapes and behaviors on the PV diagram for each process.


Is it possible to compress an ideal gas isothermally in an adiabatic piston cylinder device?

No, it is not possible to compress an ideal gas isothermally in an adiabatic piston cylinder device. In an adiabatic process, there is no heat transfer between the system and the surroundings, so the temperature of the gas will change during compression.


What is the relationship between enthalpy and temperature in an isothermal process?

In an isothermal process, the temperature remains constant. Therefore, the enthalpy change is directly proportional to the temperature change.


What does the PV diagram of an isothermal expansion illustrate?

The PV diagram of an isothermal expansion illustrates the relationship between pressure and volume during a process where the temperature remains constant.


What are the differences between statistical thermodynamics and classical thermodynamics in concepts and methods?

Statistical thermodynamics considers the behavior of a system at the molecular level, while classical thermodynamics deals with macroscopic properties of a system. Statistical thermodynamics connects thermodynamic properties to the behavior of individual particles, using probability distributions. Classical thermodynamics focuses on macroscopic relationships like energy and entropy without considering the individual particles.