CHEMISTRY HIGH SCHOOL

Which of the following best expresses the definition of an open system? (2 points)Answer

Energy can enter or leave the system but matter cannot.

Heat and matter are both able to enter or leave the system.

Matter can enter or leave the system but energy cannot.

Heat and matter can enter the system but cannot leave the system.

Answers

Answer 1
Answer: The correct answer is the second option. An open system is a system where both matter and heat are able to enter and leave the system. Simply, a system that is very prone to changes. The opposite is called a closed system.
Answer 2
Answer:

Answer: Option (b) is the correct answer.

Explanation:

An open system is defined as the one where there will occur exchanges of matter as well as heat energy between the system and surrounding.

For example, when a boil water then its heat energy will move into the surrounding and also matter is moving to the surrounding in the form of water vapor or steam.

On the other hand, a system in which there will occur no exchange of matter but exchange of heat will occur from the system to the surrounding is known as a closed system.

For example, coffee placed in a cup covered with lid is a closed system.

Thus, we can conclude that the statement heat and matter are both able to enter or leave the system best expresses the definition of an open system.

Related Questions

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Which allotrope of carbon is used in lubricants, sporting goods, and aircraft?a. graphite b. diamond c. fullerene d. coal
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Carbon -14 is an example of dating

Answers

Carbon-14 is a radioactive isotope of carbon and is used primarily in radiocarbon dating at archaeological sites since we know the half life for carbon-14 and the ratio of carbon-12 and carbon-14 a living thing probably had when it died and the difference in that ratio can tell us how old the object is.  

I hope this helps.  Let me know in the comments if anything is unclear or if your question was asking something else.

Answer: Radioactive

Explanation:

Which foods contain acids? Check all that apply:a.) limes b.) sourdough bread c.) water d.) sugar e.) honey f.) milk g.) lemons h.) tomatoes

Answers

Answer:

Limes

Lemons

Tomatoes

Explanation:

They all contain citric acid - the others are basic

Answer:

a.) Limes

b.) Sourdough bread

g.) Lemons

h.) Tomatos

Explanation:

The greatest composition by mass in an atom of 17/8 O is due to the total mass of itsA) electrons
B) neutrons
C) positrons
D) protons

Answers

Answer is B) - neutrons.


Both protons and neutrons contribute to the mass of an atom. But ₈¹⁷O atom has atomic number as 8. Hence, number of protons is 8. Atomic mass of the given atom is 17.


Atomic mass = number of protons + number of neutrons


Hence, number of neutrons in the given atom is 17 - 8 = 9.


So, the number of neutrons is greater than the number of protons. Hence the greatest composition of ₈¹⁷O atom is neutrons by mass.

What are metalloids used for

Answers

Since metalloids share qualities of metals and nonmetals, they can be used to alloy (mix) metals.
Also used to make semiconductors.

Other planets have an atmosphere, but Earth's is unique because it has large amounts of _____.nitrogen
oxygen
water vapor

Answers

the answer is oxygen because, all the other planets don't provide life and air

Just had this question, oxygen is the correct answer

What is the chemical reaction for respiration ​

Answers

Respiration is the chemical process by which organic compounds release energy. The compounds change into different ones by exergonic reactions. The hydrolysis of adenosine triphosphate (ATP) to adenosine diphosphate (ADP) and phosphoric acid (Pi) releases energy (it is an exergonic reaction).
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