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3 years ago

Write 1 paragraph. Why is earth considered a closed system ?

Chemistry

1 answer:

Paul [167]3 years ago

8 0

Answer:

Explanation:

Earth is considered a closed system because only energy, not matter, is exchanged. A closed system like Earth can be easily represented by a sealed jar. When the lid is sealed, matter like air or water can neither enter nor exit the jar. If you placed that same jar in a 100-degree oven, the air inside the jar would eventually increase in temperature to 100 degrees, representing an exchange of energy known as heat.

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In photosynthesis, the reactants are more stable than the products. However, both the products and reactants are stable. Therefo

My name is Ann [436]

Answer:

A.) Absorb and store

Explanation:

The reaction for photosynthesis is:

$6CO_{2}+ 12H_{2} O$ → $C_{6} H_{12} O_{6} +6H_{2} O$ (reaction conditions: light and chlorophyll)

carbon dioxide + water → glucose + water

This means light energy is absorbed and stored as sugar molecules and energy for the plant

Therefore, the photosynthesis reaction will  absorb  energy and  store  it in the chemical bonds.

3 0

4 years ago

Read 2 more answers

What happens inside an air-filled balloon is squeezed on all sides?

Blizzard [7]

Answer: The air molecules move closer together.

Explanation:

6 0

3 years ago

The mineral shown in this photograph is a sulfide mineral and commonly forms cube-shaped crystals. what mineral is it?

Jlenok [28]

I believe you should have attached the photo indicated in the problem. Nevertheless this problem can still be solved without the photo.

When I think about a sulphide mineral and which forms a cube shaped crystal, the answer to this question must be Pyrite.

Answer:

Pyrite (FeS2)

5 0

3 years ago

A gas sample has an initial volume of 63.2 mL, an initial temperature of 42.0 ?C, and an initial pressure of 751 mmHg. The volum

exis [7]

Answer:

Lets Write Down the Given Initial Conditions.

$P_1 = 751mmHg$ $P_2 = --$

$V_1 = 63.2ml$ $V_2 = 47.6ml$

$T_1 = 42C$ $T_2 = 77$

In Order to Solve for the Unknown: $P_2$

we must use the Ideal Gas Law to Solve for the Second Unknown pressure:

$\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}$

Then Rearrange this equation in a form where P2 can be solved from:

$P_2 = \frac{P_1V_1T_2}{T_1V_2}$

Then Insert the Values from above to solve:

$P_2 = \frac{(751 mmHg)(63.2ml)(77C)}{(47.6ml)(42C)}$

The Answer is : 1830 mmHg considering sig figs

4 0

3 years ago

indicate whether the entropy of the system increases or decreases. Mixing 10 mL of 90.0 °C water with 10 mL of 10 °C water. The

Ivanshal [37]

Answer:

When the water is mixed with water at lower temperature the effective temperature of the system (i.e the water at lower temperature) will increase, thereby increasing it's entropy

Explanation:

The answer that "the entropy will is increases" is correct as:

The water at 90° C i.e at higher temperature is mixed with the water at 10° C i.e the water at the lower temperature.

The water at lower temperature will have molecules with lower energy while the water with higher temperature will have molecules undergoing high thermal collisions. Thereby, when the water is mixed with water at lower temperature the effective temperature of the system (i.e the water at lower temperature) will increase, thereby increasing it's entropy.

Therefore, the answer is correct with respect to the water at lower temperature.

Meanwhile, for the water at higher temperature , the temperature of the system will decrease. Thus, the entropy of the water at higher level will decrease.

5 0

4 years ago