# Problem: Which of the following statements are true for an isothermal process? A. During an isothermal process, the work done by the gas equals the heat added to the gas B. An isothermal process is carried out at constant pressure. C. An isothermal process is carried out at constant temperature. D. An isothermal process is carried out at constant volume. E. During an isothermal process, the internal energy of the system changes.

###### FREE Expert Solution

Isothermal process occurs at constant temperature involving an ideal gas. Pressure can be expressed as:

P = nRT/V

For an isothermal process leading to an expansion from an initial volume, V0 to the final volume, Vf, the work is expressed as:

$\mathbit{W}\mathbf{=}\mathbit{n}\mathbit{R}\mathbit{T}\mathbit{l}\mathbit{n}\mathbf{\left(}\frac{{\mathbf{V}}_{\mathbf{f}}}{{\mathbf{V}}_{\mathbf{0}}}\mathbf{\right)}$

###### Problem Details
Which of the following statements are true for an isothermal process?

A. During an isothermal process, the work done by the gas equals the heat added to the gas
B. An isothermal process is carried out at constant pressure.
C. An isothermal process is carried out at constant temperature.
D. An isothermal process is carried out at constant volume.

E. During an isothermal process, the internal energy of the system changes.