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Posted: Fri Jan 19, 2018 7:52 pm
What are the main differences between an isolated and adiabatic system?

### Re: Isolated vs. Adiabatic system

Posted: Fri Jan 19, 2018 7:58 pm
The internal energy of an isolated system will not change over time.

In an adiabatic system, energy is not transferred as heat, but the internal energy can still change if energy is transferred to or from the system as work.
For adiabatic systems, ΔU=w because q=0.

### Re: Isolated vs. Adiabatic system

Posted: Sat Jan 20, 2018 2:55 pm
Isolated systems have no contact with its surroundings. This means they cannot exchange matter or energy with the surroundings.

From the textbook, "A system with adiabatic walls is not necessarily an isolated system: energy may be transferred to or from a system in an adiabatic container as work. In a closed adiabatic system, deltaU=w "

### Re: Isolated vs. Adiabatic system

Posted: Sat Jan 20, 2018 4:22 pm

### Re: Isolated vs. Adiabatic system

Posted: Sun Jan 21, 2018 7:33 pm
There are different types of calorimeters. I know a bomb calorimeter is a closed system.

### Re: Isolated vs. Adiabatic system

Posted: Tue Jan 23, 2018 6:01 pm
In an adiabatic process, energy is transferred to its surroundings only as work while an isolated system cannot transfer energy at all.

### Re: Isolated vs. Adiabatic system

Posted: Fri Jan 26, 2018 3:30 pm
To answer Diane's question, a normal (coffee cup calorimeter) is a closed system, while a bomb calorimeter is an isolated system. Unless if there is a heat source in the calorimeter (not including the reaction) the calorimeter is adiabatic so any heat generated will be from the material sample placed in the calorimeter.

### Re: Isolated vs. Adiabatic system

Posted: Sun Jan 28, 2018 8:04 pm
In isolated systems, no energy is transferred to the surroundings. In an adiabatic system energy is not transferred as heat to surroundings but as work.

### Re: Isolated vs. Adiabatic system

Posted: Sun Jan 28, 2018 8:22 pm
Another way of thinking about it is that an adiabatic process is a process where the net heat transfer to the working gas is zero vs an isolated system, which is a system that is completely shut off from the surroundings.