1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
seropon [69]
3 years ago
7

If an ice cube melts at 0ºC but water also freezes at 0ºC, what is the difference between melting and freezing in terms of…….

Chemistry
1 answer:
devlian [24]3 years ago
4 0

Answer:

<em>8. When melting the energy of the ice cubes increases and when frezzing the energy of the water decreases.</em>

<em />

<em>9. When melting the otion of the particles speed up, when freezing the motion of the particles slow down.</em>

Explanation:

<em><u>8. The energy involved in the phase changes</u></em>

When an ice cube melts at 0ºC it must absorb or gain energy from the surroundings. This is an endothermic process, because the energy of the liquid water shall be higher than the energy of the starting ice cubes.

In conclusion, when melting the energy of the water increases.

On the other hand, when the liquid water freezes, also at 0ºC, the flow of heat energy is from the liquid water to the surroundings. This is an exothermic process because the water releases heat. At the end, the energy of the frozen water will be lower than the energy of the liquid water.

In conclusion, when freezing the enery of the water decreases.

<u><em>9. The motion of the particles of the substances during the phase changes</em></u>

<u><em /></u>

The particles of liquid substances are in constant motion, which is what allows them to flow. This is because the particles (molecules or atoms) are relatively distant from each other, with relatively low intermolecular forces.  Thus, they can slide on each other.

On the other hand, the solid substances have the particles in fixed position in structures called crystals. The particles vibrate but do not translation motion.

In conclusion, the difference is that the motion of the particles during melting increases and the motion of th particles during freezing decreases.

You might be interested in
For the reaction Na2CO3+Ca(NO3)2⟶CaCO3+2NaNO3 how many grams of calcium carbonate, CaCO3, are produced from 79.3 g of sodium car
Alexus [3.1K]

Answer:

74.81 grams of calcium carbonate are produced from 79.3 g of sodium carbonate.

Explanation:

The balanced reaction is:

Na₂CO₃ + Ca(NO₃)₂ ⟶ CaCO₃ + 2 NaNO₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

  • Na₂CO₃: 1 mole
  • Ca(NO₃)₂: 1 mole
  • CaCO₃: 1 mole
  • NaNO₃: 2 mole

Being the molar mass of the compounds:

  • Na₂CO₃: 106 g/mole
  • Ca(NO₃)₂: 164 g/mole  
  • CaCO₃: 100 g/mole
  • NaNO₃: 85 g/mole

then by stoichiometry the following quantities of mass participate in the reaction:

  • Na₂CO₃: 1 mole* 106 g/mole= 106 g
  • Ca(NO₃)₂: 1 mole* 164 g/mole= 164 g
  • CaCO₃: 1 mole* 100 g/mole= 100 g
  • NaNO₃: 2 mole* 85 g/mole= 170 g

You can apply the following rule of three: if by stoichiometry 106 grams of Na₂CO₃ produce 100 grams of  CaCO₃, 79.3 grams of Na₂CO₃ produce how much mass of  CaCO₃?

mass of CaCO_{3} =\frac{79.3 grams of Na_{2} CO_{3} *100 grams of of CaCO_{3}}{106 grams of Na_{2} CO_{3}}

mass of CaCO₃= 74.81 grams

<u><em>74.81 grams of calcium carbonate are produced from 79.3 g of sodium carbonate.</em></u>

6 0
3 years ago
What is the role of cellular respiration in organisms?
Paha777 [63]

Answer:

C. sorry if I'm wrong ...................

3 0
2 years ago
A box has 2 cm length, 3 cm width and 2 cm height. What is its volume? *
Valentin [98]
12cm cubed.
Formula is length x width x height and in this case it would be 2x3x2 which equals 23
3 0
3 years ago
Read 2 more answers
What happens to water at 1 atm pressure as the temperature is decreased from 10°C to –10°C?
Olegator [25]

Answer:

The water freezes and becomes solid ice

4 0
2 years ago
Read 2 more answers
Why phenolphthalein is used in experiment?
Dominik [7]
In an acid-base titration, the neutralization reaction between the acid and base can be measured with either a color indicator or a pH meter. In this experiment, aphenolphthalein<span> color indicator will be </span>used<span>.
 </span>Phenolphthalein<span> is colorless in acidic solutions and pink in basic solutions.
Hope this helped 
: )</span>
4 0
3 years ago
Other questions:
  • What is the mass in grams of 2.01 x 10(22) atoms of mercury
    10·1 answer
  • Question 21 (2 points)
    10·2 answers
  • What effect does shape and size have on an object's density?
    13·1 answer
  • Which type of fuel must be the most carefully contained and protected
    15·1 answer
  • What is number one I need help
    9·1 answer
  • How much of a 15.0M stock solution do you need to prepare 250ml of a 2.35ml hf solution?
    7·1 answer
  • Large objects that form dense gravity wells in space A. Galaxies B. Star C. Nebulae D. Black holes.​
    12·2 answers
  • Chemistry: Atoms and elements. having trouble figuring out how to find out what element these atoms represent any help will be a
    15·1 answer
  • Which object has the greatest velocity? Assume the objects have equal masses.
    13·1 answer
  • Can sombody pls help me with this​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!