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3 years ago

Why is there no change in the temperature when the process of melting takes place?

Chemistry

2 answers:

Margaret [11]3 years ago

6 0

Answer: Option (A) is the correct answer.

Explanation:

During the process of melting, there is no change in the temperature because the supplied heat is used to overcome the force of attraction between the molecules.

The heat supplied to the substance at constant temperature is actually absorbed by the molecules of the substance. As a result, force of attraction between the molecules decreases and the substance changes from solid to liquid state.

This heat is also known as latent heat which means the heat is hidden as it does not result in increase in temperature.

bogdanovich [222]3 years ago

4 0

The energy is used to break bonds in order to overcome the intermolecular attractions. A is correct.

You might be interested in

Arrange the isotopes of sulfur and phosphorus in order of decreasing number of neutrons.

Monica [59]

I do not believe you're asking this...
OK. Sulfur has a total of 24 isotopes. Every isotope has 16 protons and the number of neutrons ranges from 10 to 33 inclusive.
Phosphorus has a total of 23 isotopes. They have 15 protons, and between 9 and 31 neutrons inclusive. So here we go.

S-49
S-48
S-47, P-46
S-46, P-45
S-45, P-44
S-44, P-43
S-43, P-42
S-42, P-41
S-41, P-40
S-40, P-39
S-39, P-38
S-38, P-37
S-37, P-36
S-36, P-35
S-35, P-34
S-34, P-33
S-33, P-32
S-32, P-31
S-31, P-30
S-30, P-29
S-29, P-28
S-28, P-27
S-27, P-26
S-26, P-25
P-24

If you're looking for STABLE isotopes, then the list is much smaller.
S-36
S-34
S-33
S-32, P-31

6 0

4 years ago

Read 2 more answers

What is the number of moles of gas contained in a 3 L vessel at 300 K with a pressure of 1.50 atm? (Given: R = 0.08205 L∙atm/mol

Cloud [144]

Use the PV= nRT formula and you’ll get .183 moles

4 0

3 years ago

Which group will have a charge of +2 when ionized?

inysia [295]

Answer:

Alkaline earth metals

Explanation:

Group 2 has 2 valence electrons that they lose when being ionized, thus making their charge 2+.

5 0

3 years ago

Read 2 more answers

According to the balanced chemical equation

Nadusha1986 [10]

Answer:

A) 15.5 mL

Explanation:

Given, Mass of oxalic acid = 0.3500 g

Molar mass of oxalic acid = 90.03 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{0.3500\ g}{90.03\ g/mol}$

$Moles\ of\ oxalic\ acid= 0.0038876\ mol$

According to the given reaction:

$5H_2C_2O_4_{(aq)}+2MnO_4^-_{(aq)}+6H^+_{(aq)}\rightarrow 10CO_2_{(g)}+2Mn^{2+}_{(aq)}+8H_2O_{(l)}$

5 moles of oxalic acid react with 2 moles of potassium permanganate

Thus,

1 mole of oxalic acid react with 2/5 moles of potassium permanganate

0.0038876 mole of oxalic acid react with $\frac {2}{5}\times 0.0038876$ moles of potassium permanganate

Moles of potassium permanganate = 0.001555 moles

Also, considering:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

Molarity = 0.100 M

So,

$0.100=\frac{0.001555}{Volume\ of\ the\ solution(L)}$

Volume = 0.01555 L

Also, 1 L = 1000 mL

So, volume = 15.5 mL

6 0

3 years ago

If an atom has a mass number of 25 and an atomic number of 11 how many neutrons are there in this atom?

babunello [35]

C. 14
you would subtract the mass number from the protons or the atomic number because in order to find the mass number you would add the protons and neutrons :)

5 0

3 years ago