Apiston-cylinder assembly contains propane, initially at 27°c, 1 bar, and a volume of 0.2 m^3. the propane undergoes a process to a final pressure of 4 bar, during which the pressure-volume relationship is pv(1.1) =constant. for the propane, evaluate the work and heat transfer, each in kj. kinetic and potential energy effects can be ignored.

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.