1. 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?
A. liquid contents of the glass containers
B. outside of the building
C. inside the fume hood
D. the glass containers
2. Which option is an example of an open system?
A. a pressure cooker
B. an erupting volcano
C. the sun in outer space
D. a fertilized chicken egg
3. Which statement accurately describes a reaction with very high heat energy?
A. few molecular collisions occurring quickly
B. many molecular collisions occurring slowly
C. many molecular collisions occurring quickly
D. few molecular collisions occurring slowly
4. A reaction is occurring in a test tube. How is heat transmitted to the surroundings?
A. As bubbles are formed and gas escapes, the heat is carried with the rising bubbles.
B. Heat is carried out with matter as matter is changed with the surroundings.
C. All of the heat escapes out of the open top of the test tube as molecules collide with the air.
D. Molecules collide with the glass, and the glass molecules then transmit that energy to the outside.
5. Which statement is true for an open system?
A. Matter but not heat can transfer between the system and the surroundings.
B. Heat but not matter can transfer between the system and the surroundings.
C. Heat and matter can both transfer between the system and the surroundings.
D. Heat and matter cannot transfer between the system and the surroundings.
1: Inside the fume hood
2: An erupting volcano
3: Many molecular collisions occurring quickly
4: Molecules collide with the glass, and the glass molecules then transmit that energy to the outside
5: Heat and matter can both transfer between the system and the surroundings
Got 100% so you all good :)
1 inside the Fume hood
2 an erupting Volcano
3 many molecular collisions occurring quickly
4 Molecules collide with the glass, and glass molecules then transmit that energy to the outside
5 heat and matter can both transfer between the system and the surroundings