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boyakko [2]
2 years ago
11

Explain how particles move before during and after melting

Chemistry
2 answers:
kirill115 [55]2 years ago
6 0

Answer:

(What happens to particles during melting?)

When a solid is heated the particles gain energy and start to vibrate faster and faster the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid The particles in the liquid are the same as in the solid but they have more energy

(particles after melting after melting?)

during melting, the particles start to move about staying close to their neighbouring particles then move more freely

Explanation:

Aleksandr-060686 [28]2 years ago
3 0

Answer:

Particles would move more freely, while still staying close together depending on the shape of the liquid

Explanation:

Melting is the process of going from a solid to a liquid due to the increase in heat/energy. This increase in heat/energy increases the speed at which the atoms within the object moves. Lets say we had an ice cube. While it is a cube, the particles inside the cube are slow and compact, staying close together.

When enough energy is gained, this makes the particles begin to move faster, gaining heat and energy which results in the ice cube melting and moving more freely than normal.

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How many protons and neutrons are in the nucleus of isotope with mass of 68.926 amu?
Sidana [21]
There are 30 protons and 39 neutrons in the nucleus.

This must me the isotope of an element with an atomic mass close to 69 u.
The only candidates are Zn and Ga.
Zn has a zinc-69 isotope with mass 68.926 u.
Ga has a gallium -69 isotope with mass 68.925 u.
The isotope is probably _{30} ^{69}Zn.
It has 30 protons and 39 neutrons.
4 0
3 years ago
One gram of liquid benzene is burned in a bomb calorimeter. The temperature before ignition was 20.826 C, and the temperature af
Licemer1 [7]

Answer:

fH = - 3,255.7 kJ/mol

Explanation:

Because the bomb calorimeter is adiabatic (q =0), there'is no heat inside or outside it, so the heat flow from the combustion plus the heat flow of the system (bomb, water, and the contents) must be 0.

Qsystem + Qcombustion = 0

Qsystem = heat capacity*ΔT

10000*(25.000 - 20.826) + Qc = 0

Qcombustion = - 41,740 J = - 41.74 kJ

So, the enthaply of formation of benzene (fH) at 298.15 K (25.000 ºC) is the heat of the combustion, divided by the number of moles of it. The molar mass od benzene is: 6x12 g/mol of C + 6x1 g/mol of H = 78 g/mol, and:

n = mass/molar mass = 1/ 78

n = 0.01282 mol

fH = -41.74/0.01282

fH = - 3,255.7 kJ/mol

4 0
4 years ago
Why is water necessary for rusting to happen?
Triss [41]
You need oxygen and water
5 0
3 years ago
Mount Everest is 8847 m high.how many centimeters high is Mount Everest?
a_sh-v [17]

Answer: 884,700 cm

Explanation:

Since we already know how high Mount Everest is in meters, we convert it into centimetres.

I hope you found this answer helpful!!

7 0
3 years ago
Why should an acid be handled with caution​
tiny-mole [99]

Explanation:

acid should be handled with caution because it is dangerous as it may burn the skin

7 0
2 years ago
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