4A 1 Part c)

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ckilkeary 2G
Posts: 68
Joined: Fri Aug 09, 2019 12:16 am

4A 1 Part c)

Postby ckilkeary 2G » Sun Jan 26, 2020 8:05 pm

I think I have a pretty good understanding of the different types of thermodynamic systems, but could someone explain exactly what a bomb calorimeter (in which benzene is burnt) is and how it is an isolated system?

Maggie Eberhardt - 2H
Posts: 97
Joined: Sat Jul 20, 2019 12:16 am

Re: 4A 1 Part c)

Postby Maggie Eberhardt - 2H » Sun Jan 26, 2020 8:26 pm

I didnt understand this either but according to google, "A bomb calorimeter is a type of constant-volume calorimeter used in measuring the heat of combustion of a particular reaction. Bomb calorimeters have to withstand the large pressure within the calorimeter as the reaction is being measured." this isn't super helpful, but it gave me a better idea, hope it helps!

Brianna Becerra 1B
Posts: 117
Joined: Fri Aug 02, 2019 12:16 am

Re: 4A 1 Part c)

Postby Brianna Becerra 1B » Mon Jan 27, 2020 1:34 pm

I believe that a bomb calorimeter is an isolated system because it is enclosed and the materials used in it do not allow for the reaction inside to affect the surroundings. This fits the definition of an isolated system as matter can not be exchanged due to the reaction being fully enclosed and the energy can not react with its surroundings due to the materials of the bomb calorimeter itself not allowing it to do so.

Christineg1G
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Re: 4A 1 Part c)

Postby Christineg1G » Mon Jan 27, 2020 2:02 pm

A bomb calorimeter would be a isolated system that works at a constant volume where heat (energy) is exchanged and volume is constant (isochoric).

MariaJohn1D
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Re: 4A 1 Part c)

Postby MariaJohn1D » Mon Jan 27, 2020 3:14 pm

Does the pressure change in a bomb calorimeter?

Chantel_2I
Posts: 109
Joined: Sat Sep 07, 2019 12:19 am

Re: 4A 1 Part c)

Postby Chantel_2I » Wed Jan 29, 2020 2:28 pm

MariaJohn1D wrote:Does the pressure change in a bomb calorimeter?


The pressure within the calorimeter can change when there is a reaction. However, the pressure inside is not changed by the external pressure because it is an isolated system.


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