Question

Consider the following reaction occurring in an automobile,

2C₈H₁₈(g) + 25O₂(g) → 16CO₂(g) + 18H₂O(g)

the sign of ΔH , ΔS and ΔG would be

(a) -ve, +ve, -ve

(b) +ve, -ve, +ve

(c) -ve, +ve, +ve

(d) +ve, +ve, -ve

Answer 1

Correct Option (a) -ve, +ve, -ve

Explanation:

For all combustion reactions ΔH is negative. As the number of gaseous molecules increases, entropy also increases i.e., +ve. For a spontaneous process ΔG must be negative.