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Calorimeters

Posted: Thu Feb 06, 2020 9:10 pm
by McKenna_4A
is a bomb calorimeter constant V or P??

Re: Calorimeters

Posted: Thu Feb 06, 2020 9:17 pm
by Ryan 1K
A bomb calorimeter maintains a constant V. Since V is constant, any increase in gas molecules would result in an increase in pressure since there would be more particles in the same V.

Re: Calorimeters

Posted: Sat Feb 08, 2020 12:01 am
by Betania Hernandez 2E
A bomb calorimeter is constant volume which means that since there is no change in volume then there is no work done.

Re: Calorimeters

Posted: Sat Feb 08, 2020 2:13 pm
by chrisleung-2J
A bomb calorimeter only maintains constant volume, causing no work to result from pressure or volume changes and thereby resulting in all measured heat directly correlating with the change in internal energy.

Re: Calorimeters

Posted: Sat Feb 08, 2020 2:33 pm
by Hailey Kim 4G
A bomb calorimeter measures specific heat at a constant volume.

Re: Calorimeters

Posted: Sat Feb 08, 2020 4:01 pm
by Jasmine Fendi 1D
A bomb calorimeter stays at constant volume! Because of this, there is no work being done to the system.

Re: Calorimeters

Posted: Sat Feb 08, 2020 4:22 pm
by Brian J Cheng 1I
Constant volume as many have said. It's not really constant pressure because the reaction inside can keep changing the pressure.

Re: Calorimeters

Posted: Sat Feb 08, 2020 4:31 pm
by 205405339
calorimeters maintain the same volume so constant volume

Re: Calorimeters

Posted: Sat Feb 08, 2020 4:56 pm
by Asha Agarwal 1E
It is a constant volume calorimeter.

Re: Calorimeters

Posted: Sat Feb 08, 2020 5:28 pm
by Micah3J
Is there a difference between a regular calorimeter and a bomb calorimeter?

Re: Calorimeters

Posted: Sat Feb 08, 2020 5:50 pm
by Ryan 1K
Micah3J wrote:Is there a difference between a regular calorimeter and a bomb calorimeter?


Yes, if you're talking about the simple calorimeters that are used in high school labs, which basically consist of thermometers suspended in a container filled with water. The difference between these calorimeters and bomb calorimeters is that simple calorimeters maintain a constant pressure (since it's not completely enclosed, and gases can enter and exit the container), while bomb calorimeters maintain a constant volume (sealed so gases cannot flow between the system and the surroundings).

Re: Calorimeters

Posted: Sun Feb 09, 2020 12:14 am
by Micah3J
Ryan 1K wrote:
Micah3J wrote:Is there a difference between a regular calorimeter and a bomb calorimeter?


Yes, if you're talking about the simple calorimeters that are used in high school labs, which basically consist of thermometers suspended in a container filled with water. The difference between these calorimeters and bomb calorimeters is that simple calorimeters maintain a constant pressure (since it's not completely enclosed, and gases can enter and exit the container), while bomb calorimeters maintain a constant volume (sealed so gases cannot flow between the system and the surroundings).


Ah, I see. That makes a lot more sense now. So for this class and for the midterm, which one will we be dealing with more?

Re: Calorimeters

Posted: Sun Feb 09, 2020 1:28 am
by CMaduno_1L
To answer the question above, I believe it's safe to expect to see both variations. We should know the different conditions that correspond to each type of calorimeter because both types show up in the homework problems. Hope this helps!

Re: Calorimeters

Posted: Sun Feb 09, 2020 7:31 pm
by stephaniekim2K
A bomb calorimeter is constant volume.

Re: Calorimeters

Posted: Sun Feb 09, 2020 9:19 pm
by Ryan 1K
Micah3J wrote:
Ryan 1K wrote:
Micah3J wrote:Is there a difference between a regular calorimeter and a bomb calorimeter?


Yes, if you're talking about the simple calorimeters that are used in high school labs, which basically consist of thermometers suspended in a container filled with water. The difference between these calorimeters and bomb calorimeters is that simple calorimeters maintain a constant pressure (since it's not completely enclosed, and gases can enter and exit the container), while bomb calorimeters maintain a constant volume (sealed so gases cannot flow between the system and the surroundings).


Ah, I see. That makes a lot more sense now. So for this class and for the midterm, which one will we be dealing with more?



I think since the midterm only has a limited number of questions, we will see at most one of each. I don't expect there to be more than one question dealing with the different conditions between the two calorimeters.

Re: Calorimeters

Posted: Sun Feb 09, 2020 9:50 pm
by Veronica Lu 2H
calorimeters keep a constant volume

Re: Calorimeters

Posted: Sun Feb 09, 2020 9:55 pm
by EvanWang
A bomb calorimeter has rigid walls that do not allow for expansion, therefore it is constant volume. A system with constant pressure would be open to the environment.

Re: Calorimeters

Posted: Sun Feb 09, 2020 9:59 pm
by KHowe_1D
A bomb Calorimeter has a constant volume.