Chemistry - Real Gas Question with Solution | TestHub
Consider the following statements:
1. Average translational kinetic energy of a gas molecule is proportional to the absolute temperature.
2. The total translational kinetic energy for one mole of an ideal gas is equal to 3RT.
3. Below Boyle temperature, a gas shows negative deviation at low pressure.
4. The gas with a larger value of critical pressure will have larger value of excluded volume.
Options:
Answer:
Solution:
Statement 1 is correct: average translational KE = 3/2kT ∝ T. Statement 2 is wrong: for one mole it is 3/2RT, not 3RT. Statement 3 is correct: below TB, B = b - a/RT < 0, so attractions dominate at low pressure and Z < 1. Statement 4 is wrong: b = (RTC)/(8PC), so a larger PC means a smaller b (excluded volume), not larger. Hence only 1 and 3 are correct. Ans: (b)
