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Solubility of a substance which dissolve...

Solubility of a substance which dissolves with a decrease in volume and absorption of heat will be favoured by

A

high P and high T

B

low P and low T

C

high P and low T

D

low P and high T

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To solve the problem regarding the solubility of a substance that dissolves with a decrease in volume and absorption of heat, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Nature of the Reaction**: - The problem states that the substance dissolves with a decrease in volume and absorbs heat. This indicates that the dissolution process is endothermic (it absorbs heat). 2. **Apply Le Chatelier's Principle**: - According to Le Chatelier's Principle, if a system at equilibrium is subjected to a change in conditions (like pressure or temperature), the system will adjust to counteract that change and restore a new equilibrium. 3. **Analyze the Effect of Volume Decrease**: - When the volume of the container is decreased, the pressure increases (as per the ideal gas law: PV = nRT). An increase in pressure will favor the side of the reaction that has fewer moles of gas. 4. **Consider the Endothermic Nature**: - Since the dissolution is endothermic, increasing the temperature will favor the dissolution process. This is because the system will try to absorb the added heat by shifting the equilibrium towards the products (the side that absorbs heat). 5. **Evaluate the Given Options**: - The options provided are: 1. Low pressure, low temperature 2. High pressure, low temperature 3. High pressure, high temperature 4. Low pressure, high temperature - Since we need high pressure (to favor the dissolution due to volume decrease) and high temperature (to favor the endothermic process), the most suitable option is **High pressure, high temperature**. 6. **Conclusion**: - Therefore, the solubility of the substance will be favored by **high pressure and high temperature**. ### Final Answer: The solubility of a substance which dissolves with a decrease in volume and absorption of heat will be favored by **high pressure and high temperature**. ---
To solve the problem regarding the solubility of a substance that dissolves with a decrease in volume and absorption of heat, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Nature of the Reaction**: - The problem states that the substance dissolves with a decrease in volume and absorbs heat. This indicates that the dissolution process is endothermic (it absorbs heat). 2. **Apply Le Chatelier's Principle**: ...
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If a system at equilibrium is subjected to a change of any one of the factors such as concentration , pressure or temperature, the system adjusts itself in such a way so as to minimise the effect of that change. Effect of change in concentration on equilibrium: As we add or remove reactant (or product) the ratio of equilibrium concentratio become 'Q' (reaction quotient) and depending upon. QltK : equilibrium will shift ihn forward direction QgtK equilibrium will shift in backward direction Effect of change in pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, then equilibrium will shift in the direction in which there is decrease in number of moles i.e., towards the direction in which there is decrease in volume. Effect of change in pressure on melting point : There are two rypes of solids : Solids whose volume decreases on melting, e.g., ice, diamond, carborundum, magnesium nitride and quartz. Solid (higher volume) hArr Liquid (higher volume) The process of melting is facillitated at high pressure, thus melting point is lowered. Solid whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc. Solid (lower volume) hArr Liquid (higher volume) In this case the process of melring becomes difficult at high pressure, thuse melting point becomes high. Solubility of substances : When solid substance are dissolved in water, either heat is evolved. for endothermic solubility process solubility increase with increase in temperature. For exothemic solubility decrease with increase in temperature. Solubility of gases in liquids : when a gas dissolves in liquid, there is decreases in voolume. Thus increase of pressure will faavour the dissolution of gas in liquid. Effect of temperature : For endotherimic reacrtion as temperature increases reaction shift in backward direction A'X'(g) solute when dissolved in water heat is evolved. Then solubility of' X' will increase :

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