15. Which of the following statement is TRUE? The force between atoms is The force between atoms is A zero when the potential energy B zero when the potential energy is minimum. is zero. The attractive force between C None of the above. D atoms is maximum when the potential energy of the atoms is zero. 16. An ideal has of pressure 2.0 x 105 Pa and volume 0.02 m3 is heated at constant pressure until its volume is 0.04 m3. Then the gas is heated at constant volume until its final pressure of 3.5 x 105 Pa. What is the total work done for whole process? A 7000 J B 4000 J C 0 J D 300 J 17. The work done through isothermal expansion of 1 mole of ideal gas at 100 C is 8KJ. Find the ratio of the final volume to its initial volume. A 2.58 B 1 C 13.2 D 12.5