Question

A gas being the best behaved thermodynamics substance, what is the relation between the ratio of pressure ($p$) of a gas at any temperature to pressure ($p_t$) of same gas at triple point temperature and the nature of gas?

• A. The ratio ($p/p_t$) approaches a constant value which is dependent of nature of gas
• B. The ratio ($p/p_t$) approaches a constant value which is independent of nature of gas
• C. The ratio ($p/p_t$) approaches a various values which are dependent of nature of gas
• D. None of the above

Answer 1

Answer: (B)

The ratio ($p/p_t$) approaches a constant value which is independent of nature of gas

Option B is correct.

Triple point is the temperature and pressure at which the threee phases ( gas,liquid and solid ) co - exist in thermodynamic equilibrium.

Triple point is independent of nature of gas.