Question

iclicker: predict the sign of δs_system 2n₂o(g) → 2n₂(g) + o₂(g) a) entropy decreases, δs is negative b) entropy increases, δs is positive c) entropy δs = 0 d) entropy decreases, δs is positive

Explanation:

Entropy is a measure of the degree of disorder. In the given reaction, 2 moles of $N_2O$ gas are converted into 2 moles of $N_2$ gas and 1 mole of $O_2$ gas. The number of moles of gaseous products is greater than the number of moles of gaseous reactants. An increase in the number of moles of gas leads to an increase in the disorder of the system, so entropy increases and $\Delta S$ is positive.

Answer:

B. Entropy increases, $\Delta S$ is positive