Question

When is the reaction spontaneous?

• A. \(\Delta G=2.0\)
• B. \(\Delta G\lt 0\)
• C. \(\Delta G=0\)
• D. \(\Delta G=1\)

Hint:

A reaction at constant temperature and pressure is spontaneous when its Gibbs energy change is negative.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept
For a process at constant \(T\) and \(P\), spontaneity is decided by the sign of \(\Delta G\).

Step 2: Cases
\(\Delta G<0\): spontaneous. \(\Delta G=0\): equilibrium. \(\Delta G>0\): non-spontaneous.

Step 3: Conclusion
Only \(\Delta G<0\) represents a spontaneous reaction.

Final Answer:
A reaction is spontaneous when delta G is less than zero. \[ \boxed{\text{(B) }\Delta G\lt0} \]