Is dissolving sodium chloride in water exothermic or endothermic?

It takes just slightly more energy to separate the ions from one another than is released from the water molecules surrounding the ions. This means just slightly more energy must be put into the solution than is released back into the solution; therefore dissolving table salt in water is endothermic.

Why does sodium chloride dissolve in water?

When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.

When sodium chloride is dissolved in water the temperature of the resulting solution is lower than?

2. When sodium chloride is dissolved in water, the temperature of the resulting solution is lower than the temperature of the water before the salt dissolves.

Is MgSO4 and water exothermic or endothermic?

Magnesium sulfate is an inorganic salt with the chemical formula MgSO4. It is highly soluble in water and its dissolution is an exothermic reaction: heat is given off.

Why is dissolution endothermic?

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

Why do only some salts dissolve?

Many salts are insoluble because they ionize slowly in water releasing the ions in the solution. Water molecules attract the positively charged sodium ions and negatively charged chloride ions both. Most silver salts are not soluble in water. Hydroxide salts are slightly soluble in water.

Why do endothermic reactions occur spontaneously?

For endothermic reactions, enthalpy usually goes up. However, a spontaneous endothermic reaction can occur when the changes in enthalpy and entropy yield a negative Gibbs free energy. An endothermic reaction can be spontaneous if entropy increases by more than the change in enthalpy.

What is required for an endothermic reaction to be spontaneous?

An endothermic reaction can only be spontaneous under standard conditions if the increase in molar entropy is sufficient to overcome the endothermicity. If Δ G is negative the reaction is spontaneous. Usually this equation is dominated by enthalpy changes but in rare cases entropy can determine spontaneity.

What happens when MgSO4 dissolves in water?

When dissolved in water, magnesium sulfate ionizes (separates) into magnesium (Mg2+) ions and sulfate (SO42-) ions. Solutions of magnesium sulfate have a neutral pH. Magnesium sulfate is used in many industrial processes and in the manufacturing of fertilizers.

What happens when sodium chloride dissolves in water?

Sodium chloride, a common salt, dissolves in water due to the attraction between the negative part of the water (oxygen) and the positive part of the salt (sodium). Similarly, there is also an attraction between the positively charged part of water molecules (hydrogen) and the negative chloride atoms.

Is the dissolution of NaCl in water endothermic or exothermic?

When sodium chloride (NaCl) dissolves in water, energy is absorbed (endothermic process). Likewise, people ask, is the dissolution of NaCl in water endothermic or exothermic? Answer and Explanation: Dissolving salt in water is endothermic. This means that when salt is dissolved in water the temperature of the solution is often a little lower than

Is the separation of ions in a salt endothermic or exothermic?

The separation of ions in a salt is an endothermic process. Next, the water molecules must part in order to allow the ions to enter solution. Water molecules are also attracted to each other, so it requires further energy input in order to separate them from each other. The separation of water molecules is an endothermic process.

What is the attraction between sodium chloride and water molecules?

Similarly, there is also an attraction between the positively charged part of water molecules (hydrogen) and the negative chloride atoms. When a solid salt (sodium chloride) is placed in water, the forces of multiple water molecules on salt molecules work to break the bond between sodium and chloride.