The normal boiling point of a liquid X is 400 K. Which of the following statement is true about the process `X(l) to X(g)` ?

Options

A. at 400 K and 1 atm pressure `DeltaG = 0`
B. at 400 K and 2 atm pressure `DeltaG = + ve`
C. at 400 K and 0.1 atm pressure `DeltaG = - ve`
D. at 410 K and 1 atm pressure `DeltaG = + ve`

Answer

A, B, C

Explanation

`x(l)iffx(g)T_(b)^(0)=400K`
(a) At 400 K and 1 atm pressure
`DeltaG = 0`
(b) at 2 atm and 400 K, `DeltaG =+ve`
(c ) at 400 K and 0.1 atm pressure, `DeltaG=-ve`
(d) at 410 K and 1 atm pressure, `DeltaG=-ve`