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sergejj [24]
3 years ago
10

The process of melting is what type of process? Choose the correct process and explanation.

Chemistry
1 answer:
fredd [130]3 years ago
6 0

Answer:

I think it’s b

Explanation:

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Predict the sign of ΔSo for the following reaction:
Sergio [31]

Answer: Option (a) is the correct answer.

Explanation:

Entropy means the degree of randomness present within the molecules of an object.

When a substance is present in a solid state then its molecules are held together because of strong intermolecular forces of attraction.

As a result, molecules are not able to move freely and therefore, there will be no randomness.

But when a substance changes into liquid state then its molecules mover further apart from each other due to gain in kinetic energy. Hence, randomness increases.

On the other hand, when a substance moves from liquid to gaseous state then its molecules gain more kinetic energy due to which there will be high degree of randomness.

Therefore, as the products in the given reaction are present in liquid and gaseous state. So, this means that there has been an increase in entropy.

A decrease in entropy is represented by negative sign and an increase in entropy is represented by a positive sign.

Thus, we can conclude that the sign of \Delta S_{o} for the given reaction is  \Delta S_{o} > 0.

8 0
2 years ago
What heat is liberated in the formation of 10.0 grams of sulfur hexafluoride, SF6, from the elements sulfur and fluorine?
tensa zangetsu [6.8K]

Answer:

Q=-76.7kJ

Explanation:

Hello,

In this case, for such formation of sulfur hexafluoride, the standard enthalpy of formation is -1220.47 kJ/mol (data extracted from NIST database). Next, we compute the moles in 10.0 grams of sulfur hexafluoride as shown below:

n_{SF_6}=10.0gSF_6*\frac{1molSF_6}{146.06 gSF_6}=0.0685mol

Next, for the given energy, we compute the total heat that is liberated:

Q=-1220.47\frac{kJ}{mol}*0.0685 mol\\\\Q=-76.7kJ

Finally, we conclude such symbol has sense since negative heat is related with liberated heat.

Best regards.

8 0
3 years ago
Which condition must be met in order for an equation to be balanced? The elements in the reactants are the same as the elements
Nookie1986 [14]

Answer:

There must be an equal amount of each element on both sides of the equation.

Hope this helps

good luck

8 0
3 years ago
Read 2 more answers
Scientists at a food manufacturing company compare the properties of substances for use in flavoring frozen yogurt. They prepare
Ludmilka [50]
I pick but I'm not sure about it though 1and3
7 0
2 years ago
In general, the rate of evaporation increases with ___________.
mars1129 [50]

Answer:

heat increase,   pressue loss,  altitude gain,  

Explanation:

6 0
2 years ago
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