4A. 1 Identifying open and closed system

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Riya Sood 4G
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4A. 1 Identifying open and closed system

Postby Riya Sood 4G » Fri Jan 17, 2020 1:46 pm

1. Identify the following systems as open, closed, or isolated:
(a) coffee in a very-high-quality thermos bottle; (b) coolant in a
refrigerator coil; (c) a bomb calorimeter in which benzene is
burned; (d) gasoline burning in an automobile engine; (e) mercury
in a thermometer; (f) a living plant.

How is (c) an isolated system ? Also How is (d) an open system?

Kevin Xu 4F
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Re: 4A. 1 Identifying open and closed system

Postby Kevin Xu 4F » Fri Jan 17, 2020 1:54 pm

A calorimeter is designed to be a closed system because it is supposed to measure the gain or loss of heat. A car engine is an open system because it is not contained or isolated in a container, even if it might be physically enclosed, for example in a car.

Juliana Chopelas 1A
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Re: 4A. 1 Identifying open and closed system

Postby Juliana Chopelas 1A » Thu Jan 23, 2020 12:38 pm

D is an open system because it has interactions externally with the environment, it is releasing energy into the air. C is a closed system because the bomb calorimeter is designed to keep gases in so no gas is released to interact with the environment.

805303639
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Re: 4A. 1 Identifying open and closed system

Postby 805303639 » Thu Jan 23, 2020 9:02 pm

An open system can exchange both matter and energy with the surroundings. A car engine is an open system because it exchanges heat and matter (carbon dioxide, carbon monoxide, water, and other byproducts) with its surroundings. An isolated system can exchange neither energy nor matter with its surroundings. A bomb calorimeter qualifies as an isolated system because it is both sealed and heavily insulated.

Alexandra Bartolome 2H
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Re: 4A. 1 Identifying open and closed system

Postby Alexandra Bartolome 2H » Thu Jan 30, 2020 12:08 am

Juliana Chopelas 1A wrote:D is an open system because it has interactions externally with the environment, it is releasing energy into the air. C is a closed system because the bomb calorimeter is designed to keep gases in so no gas is released to interact with the environment.


Why is C a closed system? Wouldn't a bomb calorimeter in which benzene is burned be an isolated system? The example Lavelle gave in class of an isolated system was the combustion of glucose in a bomb calorimeter, so I'm assuming it would be the same for this problem, but if I am wrong please correct me.

Leonardo Le Merle 1D
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Re: 4A. 1 Identifying open and closed system

Postby Leonardo Le Merle 1D » Thu Jan 30, 2020 10:09 am

d is an open system because matter is allowed to exit the engine through the exhaust in the form of CO2

Angela Prince 1J
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Re: 4A. 1 Identifying open and closed system

Postby Angela Prince 1J » Thu Jan 30, 2020 11:16 am

c) is an isolated system because the calorimeter does not allow exchange of matter or eneergy with the surroundings, and d) is an open system because gasoline in an automobile can change in tempertaure (energy) and in matter (which is why we need to refill our tank).

ValerieChavarin 4F
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Re: 4A. 1 Identifying open and closed system

Postby ValerieChavarin 4F » Thu Jan 30, 2020 3:52 pm

C is a closed system as the clariometer does not allow the transfer of energy to the suroundings.

DesireBrown1J
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Re: 4A. 1 Identifying open and closed system

Postby DesireBrown1J » Thu Jan 30, 2020 10:42 pm

I see that everyone is saying C is either a closed or isolated system. For clarification, the textbook solutions states that it is an isolated system. It's an isolated system because nothing is being exchanged with the environment in the bomb calorimeter. In a closed system, energy can be exchanged with the surroundings.

Madelyn Romberg 1H
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Re: 4A. 1 Identifying open and closed system

Postby Madelyn Romberg 1H » Sat Feb 01, 2020 6:47 pm

For D, matter and energy can be exchanged into the engine. Therefore, it is an open system.

Madelyn Romberg 1H
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Re: 4A. 1 Identifying open and closed system

Postby Madelyn Romberg 1H » Sat Feb 01, 2020 6:48 pm

For the bomb calorimeter, their design is made to be an isolated system. This is just a fact listed in the book and the only way you can distinguish it between a closed or isolated system.

DesireBrown1J
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Re: 4A. 1 Identifying open and closed system

Postby DesireBrown1J » Sun Feb 02, 2020 11:46 pm

Just to clarify, all biological systems are closed systems?


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