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Calorimeter - Type of System

Posted: Tue Feb 12, 2019 1:11 pm
Is a calorimeter always isolated? Therefore, does delta U always equal work, assuming no heat can enter or leave the system?

Re: Calorimeter - Type of System

Posted: Tue Feb 12, 2019 1:27 pm
A calorimeter is an isolated system so change in internal energy is always zero because neither there is a change in heat (q=0) nor there is any change in volume (w=0).

Re: Calorimeter - Type of System

Posted: Thu Feb 14, 2019 3:36 pm
Calorimeters are isolated systems because they are used to determine the heat capacities of substances, so no heat can be lost. Therefore, in calorimeters, it would be implied that the change in internal energy is equal to work since the change in heat is zero.

Re: Calorimeter - Type of System

Posted: Thu Feb 14, 2019 3:43 pm
Calorimeters are isolated systems. that is why you can calculate the final temperature of water inside a calorimeter based on the mass of calorimeter and water and their heat capacities. The heat lost by the calorimeter is absorbed by water since the water is an isolated system and no heat is lost to surroundings

Re: Calorimeter - Type of System

Posted: Sat Feb 16, 2019 1:04 pm
Also, a bomb calorimeter, an isolated system, will always have constant volume.

Re: Calorimeter - Type of System

Posted: Tue Feb 19, 2019 11:10 pm
What are some other systems that will always be isolated?