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3 years ago

Which response includes all of the following processes that are accompanied by an increase in entropy?

Chemistry

1 answer:

dlinn [17]3 years ago

7 0

Answer:

1 and 3.

Explanation:

The entropy measures the randomness of the system, as higher is it, as higher is the entropy. The randomness is associated with the movement and the arrangement of the molecules. Thus, if the molecules are moving faster and are more disorganized, the randomness is greater.

So, the entropy (S) of the phases increases by:

S solid < S liquid < S gases.

1. The substance is going from solid to gas, thus the entropy is increasing.

2. The substance is going from a disorganized way (the molecules of I are disorganized) to an organized way (the molecules join together to form I2), thus the entropy is decreasing.

3. The molecules go from an organized way (the atom are joined together) to a disorganized way, thus the entropy increases.

4. The ions are disorganized and react to form a more organized molecule, thus the entropy decreases.

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Which of the following phase changes only occurs in solids possessing vapor pressures above atmospheric pressure and at ambient

GuDViN [60]

<u>Answer:</u> The phase change process in which solids gets converted to gases is sublimation.

<u>Explanation:</u>

For the given options:

<u>Option a:</u> Condensation

It is a type of process in which phase change occurs from gaseous state to liquid state at constant temperature.

$Gas\rightleftharpoons Liquid$

<u>Option b:</u> Melting

It is a type of process in which phase change occurs from solid state to liquid state at constant temperature.

$Solid\rightleftharpoons Liquid$

<u>Option c:</u> Sublimation

It is a type of process in which phase change occurs from solid state to gaseous state without passing through the liquid state at constant temperature.

$Solid\rightleftharpoons Gas$

<u>Option d:</u> Deposition

It is a type of process in which phase change occurs from gaseous state to solid state without passing through the liquid state at constant temperature.

$Gas\rightleftharpoons Solid$

Hence, the phase change process in which solids gets converted to gases is sublimation.

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3 years ago

What is an oxidation reaction?

kow [346]

<h3>Definition:</h3>

A reaction when an atom or compound loses one or more electrons.

It is a reaction is a type of chemical reaction that involves a transfer of electrons between two species.

Oxidation is gain of oxygen

<h3>For Example:</h3>

Fe + O2 —(H2O)—> Fe2O3

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2 years ago

Please help and thank you so much

olchik [2.2K]

A. Sorry if I’m wrong :(

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2 years ago

How does reproduction leads to natural selection in a population

Advocard [28]

Natural selection requires variation between individuals. Mutations and reproduction increase genetic variation in a population. Natural selection occurs when environmental pressures favor certain traits that are passed on to offspring.

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2 years ago

When you transferred the hot metal from the boiling water and into the calorimeter (coffee cup), if the thermometer touched the

sergey [27]

When you transferred the hot metal from the boiling water and into the calorimeter, The effect will be

Change in temp is positive
Temp of metal V, dT=-ve
No change occurs in the specific heat of metal

This is further explained below.

<h3>What is the Specific heat of the metal?</h3>

a )Since the metal of the cup is hot and the water inside is cold, the water's temperature will rise as heat is transferred from the metal to the liquid.

Change in temp is positive

Due to (a), heat is lost from the food to the water in the cup, lowering the metal's temperature.

Temp of metal V, dT=-ve

No change occurs in the specific heat of metal because of its constant property.