Final answer:
The temperature at which sodium hydroxide decomposes is 360°C, forming sodium oxide and water. The condensation can be collected by cooling down the reaction mixture or the hot gases.
Step-by-step explanation:
The temperature at which sodium hydroxide decomposes is 360°C. When sodium hydroxide is heated to this temperature, it breaks down into sodium oxide (Na₂O) and water (H₂O).
To collect the condensation, you would need to cool down the reaction mixture or the hot gases and collect the water vapor that condenses.