Which compound is the process of dissolving in water exothermic?

Asked by: Orpha Reynolds
Score: 4.8/5 (48 votes)

Potassium chloride absorbs heat from its surroundings when it dissolves in water. Therefore, dissolution of potassium chloride is an endothermic process

endothermic process
An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. ... The opposite of an endothermic process is an exothermic process, one that releases or "gives out" energy, usually in the form of heat and sometimes as electrical energy.
https://en.wikipedia.org › wiki › Endothermic_process
. The dissolution of calcium chloride is an exothermic process.

Is dissolving in water exothermic?

The process of dissolving is exothermic when more energy is released when water molecules “bond” to the solute than is used to pull the solute apart. Because more energy is released than is used, the molecules of the solution move faster, making the temperature increase.

Does NaCl dissolve in water by an exothermic process?

Dissolution of NaCl in waterDissolution of sodium chloride in water is endothermic. Solute-solvent attractive bond formation (the exothermic step in the process of solvation) is indicated by dashed lines. “heat of solution.”

Is NaOH dissolved in water exothermic?

Similar to the hydration of sulfuric acid, dissolution of solid sodium hydroxide in water is a highly exothermic reaction where a large amount of heat is liberated, posing a threat to safety through the possibility of splashing.

45 related questions found

Why dissolution of NaOH in water is exothermic?

Dissolving sodium hydroxide in water is exothermic. This is because the sodium ions and hydroxyl ions are capable of interacting with the water...

What happens during dissolving?

A solvent is the substance that does the dissolving – it dissolves the solute. In salt solution, water is the solvent. During dissolving, particles of solvent collide with particles of solute. They surround the particles of solute, gradually moving them away until the particles are evenly spread through the solvent.

Why is crystallization exothermic?

And the breaking of bonds REQUIRES energy. And since crystallization definitely represents the making of bonds, this is an EXOTHERMIC process. ... The hot packs are saturated or supersaturated solutions of some salt; you break a blister on the pack, and the solution crystallizes releasing heat.

Is cooking an egg endothermic or exothermic?

The endothermic reaction described is of cooking an egg. In the process, the heat from the pan is being absorbed by the egg, which is the process of it cooking, so therefore the end result is a cooked egg.

Why is dissolving cacl2 exothermic?

Solid calcium chloride is deliquescent, meaning it can absorb enough moisture to convert to liquid brine. ... When dissolved in water, solid calcium chloride releases heat in an exothermic reaction.

Is dilution of h2so4 exothermic?

(b) The process of dissolving sulphuric acid in water i.e., dilution of sulphuric acid) is a highly exothermic reaction.

Why the process of dissolving an acid or base in water is highly exothermic?

The process of dissolving an acid or a base in water is highly exothermic one as a huge amount of heat is evolved during the process owing to the production of H+ or OH− ions.

What are the 3 steps in the dissolving process?

  1. Step 1: Separate particles of the solute from each other.
  2. Step 2: Separate particles of the solvent from each other.
  3. Step 3: Combine separated solute and solvent particles to make solution.

Is KCL in water endothermic?

Potassium chloride absorbs heat from its surroundings when it dissolves in water. Therefore, dissolution of potassium chloride is an endothermic process.

Is dilution of acid exothermic?

While diluting an acid, adding water to the acid is an exothermic process resulting in release of so much heat.

Is melting exothermic?

The opposite process, a liquid becoming a solid, is called solidification. ... However, it can be used for both the melting and the solidification processes as long as you keep in mind that melting is always endothermic (so ΔH will be positive), while solidification is always exothermic (so ΔH will be negative).

Is freezing exothermic?

When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction.

How does crystallization occur?

To crystallize an impure, solid compound, add just enough hot solvent to it to completely dissolve it. ... As the solution cools, the solvent can no longer hold all of the solute molecules, and they begin to leave the solution and form solid crystals.

What is the difference between melting and dissolving?

Melting and dissolving are not the same. In melting only one substance is involved and the liquid and solid are the same material. ... Dissolving involves two materials; the resulting solution is a mixture of both.

How can you speed up the process of dissolving?

Stirring a solute into a solvent speeds up the rate of dissolving. This is because it helps distribute the particles throughout the solvent. For example, when you add sugar to iced tea and then stir the tea, the sugar will dissolve faster.

Is dissolving a chemical reaction?

All processes that involve the interaction of atoms are chemical. Dissolving salt in water is a chemical reaction.

Why dissolution of gas is exothermic?

In general, heat energy is released as gas dissolves in solution, meaning the dissolution reaction is exothermic. As such, a gas becomes less soluble as temperate increases. ... Gas molecules with greater kinetic energy move more rapidly resulting in the intermolecular bonds between the gas solute and solvent breaking.

What are examples of an exothermic reaction?

Here are some of the examples of exothermic reaction:
  • Making of an ice cube. Making ice cube is a process of liquid changing its state to solid. ...
  • Snow formation in clouds. ...
  • Burning of a candle. ...
  • Rusting of iron. ...
  • Burning of sugar. ...
  • Formation of ion pairs. ...
  • Reaction of Strong acid and Water. ...
  • Water and calcium chloride.

Why hydration process is exothermic?

Yes. The definition of enthalpy change of hydration is the enthalpy change when one mole of aqueous ions are formed from one mole of ions in the gaseous state. All that happens during this process is that bonds/attractions are formed between the ions and water molecules. ... Bond making releases energy (exothermic step).