Question

The degrees of freedom for a system consisting a gaseous mixture of \( N_2 \), \( H_2 \), and \( NH_3 \) is

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

For single-phase gas systems, degrees of freedom = number of components + 1.

Answer 1

The Correct Option is D

Using Gibbs' phase rule: \( F = C - P + 2 \)
Where:
\( C = 3 \) (components: \( N_2 \), \( H_2 \), \( NH_3 \))
\( P = 1 \) (single gaseous phase)
\[ F = 3 - 1 + 2 = 4 \]