Calorimeters

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McKenna_4A
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Calorimeters

Postby McKenna_4A » Thu Feb 06, 2020 9:10 pm

is a bomb calorimeter constant V or P??

Ryan 1K
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Re: Calorimeters

Postby Ryan 1K » Thu Feb 06, 2020 9:17 pm

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.

Betania Hernandez 2E
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Re: Calorimeters

Postby Betania Hernandez 2E » Sat Feb 08, 2020 12:01 am

A bomb calorimeter is constant volume which means that since there is no change in volume then there is no work done.

chrisleung-2J
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Re: Calorimeters

Postby chrisleung-2J » Sat Feb 08, 2020 2:13 pm

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.

Hailey Kim 4G
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Re: Calorimeters

Postby Hailey Kim 4G » Sat Feb 08, 2020 2:33 pm

A bomb calorimeter measures specific heat at a constant volume.

Jasmine Fendi 1D
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Re: Calorimeters

Postby Jasmine Fendi 1D » Sat Feb 08, 2020 4:01 pm

A bomb calorimeter stays at constant volume! Because of this, there is no work being done to the system.

Brian J Cheng 1I
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Re: Calorimeters

Postby Brian J Cheng 1I » Sat Feb 08, 2020 4:22 pm

Constant volume as many have said. It's not really constant pressure because the reaction inside can keep changing the pressure.

205405339
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Re: Calorimeters

Postby 205405339 » Sat Feb 08, 2020 4:31 pm

calorimeters maintain the same volume so constant volume

Asha Agarwal 1E
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Re: Calorimeters

Postby Asha Agarwal 1E » Sat Feb 08, 2020 4:56 pm

It is a constant volume calorimeter.

Micah3J
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Re: Calorimeters

Postby Micah3J » Sat Feb 08, 2020 5:28 pm

Is there a difference between a regular calorimeter and a bomb calorimeter?

Ryan 1K
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Re: Calorimeters

Postby Ryan 1K » Sat Feb 08, 2020 5:50 pm

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).

Micah3J
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Re: Calorimeters

Postby Micah3J » Sun Feb 09, 2020 12:14 am

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?

CMaduno_1L
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Re: Calorimeters

Postby CMaduno_1L » Sun Feb 09, 2020 1:28 am

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!

stephaniekim2K
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Re: Calorimeters

Postby stephaniekim2K » Sun Feb 09, 2020 7:31 pm

A bomb calorimeter is constant volume.

Ryan 1K
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Joined: Fri Aug 09, 2019 12:15 am

Re: Calorimeters

Postby Ryan 1K » Sun Feb 09, 2020 9:19 pm

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.

Veronica Lu 2H
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Re: Calorimeters

Postby Veronica Lu 2H » Sun Feb 09, 2020 9:50 pm

calorimeters keep a constant volume

EvanWang
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Re: Calorimeters

Postby EvanWang » Sun Feb 09, 2020 9:55 pm

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.

KHowe_1D
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Re: Calorimeters

Postby KHowe_1D » Sun Feb 09, 2020 9:59 pm

A bomb Calorimeter has a constant volume.


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