Question

When helium is allowed to expand into vacuum , heating effect is observed . Its reason is that:

• A. Helium is an ideal gas
• B. Helium is an inert gas
• C. The inversion temperature of helium is very low
• D. The boiling point of helium is the lowest among the elements

Answer 1

The correct option is C The inversion temperature of helium is very low

When helium is allowed to expand into the vacuum , the heating effect is observed because the Inversion temperature of Helium is very low.

Hence, Option "C" is the correct answer.