Explain the following observations. Part A An open can of soda loses its \"fizz\

Question

Explain the following observations.

Part A An open can of soda loses its "fizz" faster at room temperature than in the refrigerator. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. CO2 more H2O decreases increases less The solubility of (which makes the soda "fizz") as the temperature increases. Thus, will remain dissolved in the room temperature soda than in the soda at cooler refrigerator temperatures.

Part B Chlorine gas in tap water escapes as the sample warms to room temperature. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. more gas liquid less 1. Any (such as Cl2) will be soluble as the cool tap water warms to room temperature.

Part C Less sugar dissolves in iced coffee than in hot coffee. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. less (i) more (ii) liquid (iii) solid 1. A solute such as sugar is soluble at cooler temperatures (as in iced coffee) than at warmer temperatures (hot coffee).

Part C A warm can of soda has more spray when opened than a cold one. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. (i)more (ii) less increased (iii) decreased The solubility of a gaseous solute is at a higher temperature, and the CO2 pressure in the can is . When the can of warm soda is opened, CO2 is released, producing spray.

Order the steps involved in the formation of a solution. Rank the steps involved in the dissolution of salt in water from first step to last step. To rank items as equivalent, overlap them.

(i) First (ii) Last

Part C - Factors affecting the dissolution process

The rate at which a solute dissolves in a solvent depends on the kinetic energy of the solution, the time of contact, and the surface area of contact between the solute and the solvent particles. Both endothermic and exothermic dissolution processes will respond similarly to each factor, however the change may be more pronounced depending on the thermodynamic parameters of the reaction. As the kinetic energy, time of contact, and surface area of contact between the solute and the solvent particles increase, the rate at which the solute undergoes dissolution in a solvent increases. Similarly, as the kinetic energy, time of contact, and surface area of contact between the solute and the solvent particles decrease, the rate at which the solute undergoes dissolution in a solvent decreases.

The dissolution process can be altered by varying these parameters, such as by increasing or decreasing the temperature or by reducing the particle size of the solute.

Consider the preparation of a NaCl salt solution using coarse crystals of NaCl in an unstirred container at room temperature. Classify the following conditions based on the change in the rate of dissolution of NaCl in water compared to the initial preparation if the dissolution process is endothermic.

Drag the appropriate items to their respective bins.

(i) Faster dissolution process (ii)Slower dissolution process

* NaCl salt is added to water, and the mixture is heated.

* A large piece of NaCl salt is added to water.

* NaCl salt is added to water, and the mixture is cooled.

* NaCl salt is added to water, and the mixture is stirred.

* Finely powdered NaCl salt is added to water.

(i) Faster dissolution process (ii)Slower dissolution process

* NaCl salt is added to water, and the mixture is heated.

* A large piece of NaCl salt is added to water.

* NaCl salt is added to water, and the mixture is cooled.

* NaCl salt is added to water, and the mixture is stirred.

* Finely powdered NaCl salt is added to water.

Explanation / Answer

a) An open can of soda loses its "fizz" faster at room temperature than in the refrigerator.: The solubility of gas increases with decrease in temperature.

The solubility of CO2 will decrease as the tempeature is increased. Thus, will remain less dissolved in the room temperature soda than in the soda at cooler refrigerator temperatures.

b) Chlorine gas in tap water escapes as the sample warms to room temperature

Any gas (such as Cl2) will be less soluble as the cool tap water warms to room temperature.

c) A warm can of soda has more spray when opened than a cold one.

The solubility of a gaseous solute is decreased at a higher temperature, and the CO2 pressure in the can is increased. When the can of warm soda is opened, CO2 is released, producing spray.

2) NaCl salt is added to water, and the mixture is heated: Faster dissolution

* A large piece of NaCl salt is added to water: slower dissolution

* NaCl salt is added to water, and the mixture is cooled: slower dissolution

* NaCl salt is added to water, and the mixture is stirred: faster dissolution

* Finely powdered NaCl salt is added to water: Faster dissolution

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