An ideal gas has an initial pressure of 3 pressure units and an initial volume of 4 volume units. The table gives the final pressure and volume of the gas (in those same units) in four processes. Which processes start and end on the same isotherm
A | B | C | D | |
P | 5 | 4 | 12 | 6 |
V | 7 | 6 | 1 | 3 |