Random versus ordered combustion temperature

[dymand68]

1. Homework Statement :
Molecules in the combustion chamber of a rocket engine are in a high state of random motion. When the molecules leave through a nozzle in a more ordered state, will their temperature be more, less, or the same as their temperature in the chamber before being exhausted?

Homework Equations

temperature (energy) rises(or falls) as pressure increases (or decreases)

The Attempt at a Solution

temperature is more leaving through the nozzle, in a more ordered state (?)

 

[member 553083]

The temperature of the molecules will be greater when they leave through the nozzle. This is because as the pressure in the combustion chamber decreases, the temperature of the molecules increases. This increase in pressure is due to the more ordered state of the molecules as they leave through the nozzle.