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
Feliz [49]
3 years ago
13

Which is the first step in the dissolving process

Chemistry
1 answer:
alina1380 [7]3 years ago
4 0

<span>In a dissolving process, energy is required to overcome the forces of attraction between the solvent particles. The first step is for the solvent particles to move in order for solute particles to enter the system. This process is endothermic where energy flows into the system. The second step is when solute particles must separate from other solute particles. Lastly, the solute should move between solvent particles.</span>

You might be interested in
A 2.0 ml sample of a colorless solution, when treated with a few drops of 2 m hydrochloric acid, forms a white precipitate which
Rainbow [258]
Na+ions I think . . .
6 0
4 years ago
What is the specific heat of ethanol if 4650 j are required to raise the temperature of 250.0g of ethanol from 22.0oc to 29.6 de
Alchen [17]

Answer:

C=2.45\frac{J}{g\°C}

Explanation:

Hello there!

In this case, since the thermodynamic definition of heat in terms of mass, specific heat and temperatures is given by:

Q=mC(T_2-T_1)

We are to calculate the specific heat of the ethanol as shown below:

C=\frac{Q}{m(T_2-T_1)}

Thus, by plugging it the given data we can obtain:

C=\frac{4650J}{250.0g(29.6-22.00\°C)} \\\\C=2.45\frac{J}{g\°C}

Regards!

5 0
3 years ago
For each of the following pairs of substances, determine which has the larger molar entropy at 298 K: (A) Br₂(l) or (B) Cl₂(g) (
irakobra [83]

Explanation:

Entropy is defined as the degree of randomness present in a substance. Therefore, more is the irregularity present in a compound more will be its molar entropy.

Hence, decreasing order to molar entropy in state of matter is as follows.

                     Gases > Liquids > Solids

  • In the first pair, we are given Br_{2}(l) or Cl_{2}(g). Since, molar entropy of liquids is less than the molar entropy of gases.

Hence, Cl_{2}(g) will have larger molar entropy as compared to Br_{2}(l).

  • In the second pair, we are given Fe(s) or Ni(s). More is the molar mass of a compound more will its molar entropy. Molar mass of Fe is 55.84 g/mol and molar mass of Ni is 58.69 g/mol.

Hence, molar entropy of Ni(s) is more than the molar entropy of Fe(s).

  • In the third pair, we are given C_{2}H_{6}(g) or C_{2}H_{4}(g). As both the given species are gaseous in nature. So, more is the molar mass of specie more will be its molar entropy.

Molar mass of C_{2}H_{6}(g) is 30.07 g/mol and molar mass of C_{2}H_{4}(g) is 28.05 g/mol. Therefore, molar entropy of C_{2}H_{6}(g) is more than the molar entropy of C_{2}H_{4}(g).

  • In the fourth pair, we are given CCl_{4}(g) or CH_{4}(g). Molar mass of CCl_{4}(g) is 153.82 g/mol and molar mass of CH_{4}(g) is 16.04 g/mol.

Therefore, molar entropy of CCl_{4}(g) is more than the molar entropy of CH_{4}(g).

  • In the fifth pair, we are given HgO(s) or MgO(s). Molar mass of HgO is 216.59 g/mol and molar mass of MgO is 40.30 g/mol.

Hence, molar entropy of HgO(s) is more than the molar entropy of MgO.

  • In the fifth pair, we are given NaCl(aq) or MgCl_{2}(aq). Molar mass of NaCl 58.44 g/mol and molar mass of MgCl_{2}(aq) is 95.21 g/mol.

Hence, the molar entropy of MgCl_{2}(aq) is more than the molar entropy of NaCl(aq).

5 0
3 years ago
Someone please help me !!
Bezzdna [24]

Answer:

3

Explanation:

6 0
3 years ago
An invasive species is a species that disrupts the ecosystem into which it is introduced by displacing species.
sveta [45]

Invasive species can do all sorts of damage to an existing ecosystem, including changing habitats and starving native animals of food and resources.

<h3>What is an invasive species?</h3>

An invasive species is an organism that causes ecological or economic harm in a new environment where it is not native.

Invasive species can change the food web in an ecosystem by destroying or replacing native food sources. The invasive species may provide little to no food value for wildlife. Invasive species can also alter the abundance or diversity of species that are important habitats for native wildlife.

Learn more about the invasive species here:

brainly.com/question/21452505

#SPJ1

7 0
2 years ago
Other questions:
  • The study of all chemicals containing carbon is called _____. inorganic chemistry organic chemistry physical chemistry biochemis
    11·2 answers
  • An industrial chemist is studying a sample of an unknown metal. Describe two ways he could change the metal physically and two w
    9·1 answer
  • In this reaction, ethane is burned in the presence of oxygen (O2 O 2 ) to form carbon dioxide (CO2 C O 2 ) and water (H2O H 2 O
    13·1 answer
  • Pressure gauge at the top of a vertical oil well registers 140 bars. The oil well is 6000 m deep and filled with natural gas dow
    12·1 answer
  • What would a substance that could undergo condensation polymerization most likely have?
    11·2 answers
  • The table shows the average population of two competing weeds over a square meter of ground in a Georgia field. The table also g
    6·1 answer
  • How does energy from the earth become part of out bodies?
    6·1 answer
  • 1. Which is not an example of a physical change to a wooden stick?
    12·1 answer
  • Most of the mass in a growing tree comes from what?<br> Trunk<br> CO2<br> Leaves<br> Oxygen
    5·1 answer
  • Can you give a definition of what Sodium Hydroxide
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!