Question

The degree of freedoms for sulphur system at the triple point is :

• A. 0
• B. -1
• C. 2
• D. 1

Answer 1

The correct option is A 0

The degree of freedoms for sulphur system at the triple point is $0$.

At the triple point $P=3,C=1$

According to the phase rule,

$F+P=C+2$

$F+3=1+2$

$\therefore F=0$.