h₂o(g) → h₂ + o₂(g)\npredict whether the reaction above would have an increase or a decrease in…

h₂o(g) → h₂ + o₂(g)\npredict whether the reaction above would have an increase or a decrease in entropy.\nincrease\ndecrease

h₂o(g) → h₂ + o₂(g)\npredict whether the reaction above would have an increase or a decrease in entropy.\nincrease\ndecrease

Answer

Explanation:

Step1: Balance the chemical equation

$2H_2O(g)\rightarrow 2H_2(g)+O_2(g)$

Step2: Analyze the number of moles of gas

On the reactant - side, there are 2 moles of gaseous $H_2O$. On the product - side, there are 2 moles of $H_2$ and 1 mole of $O_2$, a total of 3 moles of gas.

Step3: Recall the concept of entropy

Entropy is a measure of the degree of disorder. For gaseous reactions, an increase in the number of moles of gas leads to an increase in entropy. Since the number of moles of gas increases from 2 to 3, the entropy of the system increases.

Answer:

Increase