Which of the following best describes an isothermal system?

A. There is an expansion of gas/work being done at a single pressure gradient.
B. There is an expansion of gas/work being done at a single temperature gradient.
C. There is no expansion of gas/work being done at a single temperature gradient.
D. There is an expansion of gas/work being done at a multiple temperature gradients.

Question

Which of the following best describes an isothermal system?

A. There is an expansion of gas/work being done at a single pressure gradient. 
 B. There is an expansion of gas/work being done at a single temperature gradient. 
 C. There is no expansion of gas/work being done at a single temperature gradient. 
 D. There is an expansion of gas/work being done at a multiple temperature gradients.

photon336 · Answer

Isothermal @constant temp
Change in internal energy = 0 
Q = -W

photon336 · Answer

Think it's B