Can someone check my answers for me? Thanks.

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A chemist is performing a chemical reaction under a fume hood. The chemist has a set of beakers, flasks, and tubes set up under the fume hood, with various liquids being combined inside the glass containers. The fume hood is turned on in order to withdraw any toxic gases and expel them outside the building.

Which part of this system is designated as the surroundings?

liquid contents of the glass containers

inside the fume hood < MY ANSWER

the glass containers

outside of the building
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Which option is an example of an open system?

the sun in outer space

a fertilized chicken egg

an erupting volcano < MY ANSWER

a pressure cooker
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Which statement accurately describes a reaction with very high heat energy?

few molecular collisions occurring slowly

many molecular collisions occurring slowly

many molecular collisions occurring quickly < MY ANSWER

few molecular collisions occurring quickly
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A reaction is occurring in a test tube. How is heat transmitted to the surroundings?

All of the heat escapes out of the open top of the test tube as molecules collide with the air.

Molecules collide with the glass, and the glass molecules then transmit that energy to the outside. < MY ANSWER

Heat is carried out with matter as matter is changed with the surroundings.

As bubbles are formed and gas escapes, the heat is carried with the rising bubbles.
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Which statement is true for an open system?

Heat but not matter can transfer between the system and the surroundings.

Heat and matter can both transfer between the system and the surroundings.

Heat and matter cannot transfer between the system and the surroundings.

Matter but not heat can transfer between the system and the surroundings. < MY ANSWER

Everything is right except the last one. the last one is

Heat and matter can both transfer between the system and the surroundings.

Yep, you were correct! Thanks.

Shank You

It seems like you have answered the questions correctly. Well done!

Let's go through each question and its answer to understand why it is correct:

1. Which part of this system is designated as the surroundings?
- Your answer: inside the fume hood
- Correct explanation: In this system, the fume hood acts as a barrier between the internal setup and the outside environment. Therefore, the surroundings are considered to be outside of the fume hood.

2. Which option is an example of an open system?
- Your answer: an erupting volcano
- Correct explanation: An open system is one that can exchange both matter and energy with its surroundings. In this case, an erupting volcano releases both matter (such as lava and volcanic gases) and energy (from the heat and explosions). Thus, an erupting volcano is an example of an open system.

3. Which statement accurately describes a reaction with very high heat energy?
- Your answer: many molecular collisions occurring quickly
- Correct explanation: High heat energy is typically associated with increased molecular motion and collisions. The statement "many molecular collisions occurring quickly" accurately describes a reaction with very high heat energy.

4. A reaction is occurring in a test tube. How is heat transmitted to the surroundings?
- Your answer: Molecules collide with the glass, and the glass molecules then transmit that energy to the outside.
- Correct explanation: Heat is transmitted to the surroundings in various ways. In this particular scenario, molecules within the test tube collide with the glass, and the glass, being in contact with the outside environment, transmits that energy to the surroundings.

5. Which statement is true for an open system?
- Your answer: Heat and matter can both transfer between the system and the surroundings.
- Correct explanation: An open system allows for the transfer of both matter and energy (heat) between the system and its surroundings. Heat can be exchanged through conduction, convection, or radiation, while matter can enter or exit the system.