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Bomb calorimeters vs polystyrene cup calorimeters

Posted: Thu Feb 07, 2019 1:10 pm
by Letizia Ye 4F
During lecture we mentioned bomb calorimeters and normal calorimeters, what is the difference between the two? What conditions and equations apply to each of them?

Re: Bomb calorimeters vs polystyrene cup calorimeters

Posted: Thu Feb 07, 2019 1:32 pm
by mbaker4E
A bomb calorimeter measures heat flow at a constant volume, as you can imagine a bomb as a rigid chamber that cannot increase in volume. A polystyrene cup calorimeter on the other hand measured changes in temperature at a constant pressure.

Re: Bomb calorimeters vs polystyrene cup calorimeters

Posted: Fri Feb 08, 2019 12:10 pm
by Hedi Zappacosta 1E
The polystyrene calorimeter is an open system. heat can leave. But a bomb calorimeter is closed and isolated

Re: Bomb calorimeters vs polystyrene cup calorimeters

Posted: Fri Feb 08, 2019 12:14 pm
by Aria Soeprono 2F
Wouldn't a regular polystyrene calorimeter be an approximation of a closed system, because heat can go out but volume remains the same?