So energy is not allowed to leave our bomb kilometer. The intermodal chamber is called a steel bomb and it's basically the location of our reaction. This is where our reaction occurs and it's made from steel so that the gas can't expand our system. Now this thermometer is placed into the water and everything is sealed off. And our goal is to basically change or measure the change in temperature of our reaction, okay? The same way we do in a coffee cup calorimeter.