Question

When helium is allowed to expand into vacuum, heating
effect is observed. This is due to the fact that:
(a) helium is an inert gas
(b) helium is a noble gas
(c) helium is an ideal gas
(d) the inversion temperature of helium is very low​

Answer 1

Answer:

When helium is allowed to expand into vacuum, heating effect is observed. This is due to the fact that helium is a noble gas.

Answer 2

(d) the inversion temperature of helium is very low​

[NOT:THE MEANING OF NOBEL GAS, INERT GAS AND IDEAL GAS IS SAME, THESE ARE THE DIFFERENT NAMES FOR THE NOBEL GAS.]