Chemistry Concepts: Solubility and Changes

Pressure and temperature help convert the remains of dead plants and animals into liquid oil over time.

A reversible change is one that can be undone to return to the original substance, such as melting or boiling.

The burning of a candle wick is an example of an irreversible change.

<p>Immiscible liquids do not mix with each other, like oil and water.</p> Signup and view all the answers

<p>Temperature affects solubility; higher temperatures generally increase the solubility of solids in liquids.</p> Signup and view all the answers

<p>Good conductors of heat include metals like iron, copper, and silver.</p> Signup and view all the answers

<p>Running the lid under hot water causes it to expand, making it easier to open.</p> Signup and view all the answers

<p>Electric conductivity is the ability of a substance to carry electricity.</p> Signup and view all the answers

<p>Miscible liquids can mix completely, while immiscible liquids do not blend but separate.</p> Signup and view all the answers

<p>Increasing stirring typically enhances the rate at which a solute dissolves in a solvent.</p> Signup and view all the answers

<p>Pressure from heat and the weight of rocks transforms dead plants and animals into liquid oil.</p> Signup and view all the answers

<p>Reversible changes are those that can restore the original substance, like melting of wax.</p> Signup and view all the answers

<p>An irreversible change is one that cannot return to the original substance, such as burning a wick of a candle.</p> Signup and view all the answers

<p>Sand and oil are immiscible with water.</p> Signup and view all the answers

<p>Temperature, stirring, and particle size affect a substance's solubility.</p> Signup and view all the answers

<p>Copper is a good conductor; rubber is an insulator.</p> Signup and view all the answers

<p>'Miscible' refers to two liquids that can mix together, like vinegar and water.</p> Signup and view all the answers

<p>Solubility generally increases with temperature.</p> Signup and view all the answers

<p>She ran the lid under hot water, causing it to expand and loosen.</p> Signup and view all the answers

<p>'Immiscible' means that two liquids do not mix or dissolve in each other.</p> Signup and view all the answers

<p>Petroleum is formed from dead plants and animals that, under the pressure and heat of overlying rocks, break down into liquid oil.</p> Signup and view all the answers

<p>Miscible liquids mix uniformly with each other, while immiscible liquids do not mix and separate into layers.</p> Signup and view all the answers

<p>Increasing temperature generally increases the solubility of a solute in a solvent.</p> Signup and view all the answers

<p>Stirring and particle size are two factors that affect the rate of dissolution.</p> Signup and view all the answers

<p>Hot water provides more energy, allowing sugar molecules to separate and disperse more rapidly.</p> Signup and view all the answers

<p>Thermal expansion occurs when matter increases in volume due to an increase in temperature.</p> Signup and view all the answers

<p>The melting of wax is a reversible change because the wax can return to its original solid state upon cooling.</p> Signup and view all the answers

<p>Conductors are materials that allow heat or electricity to flow easily through them, while insulators resist this flow.</p> Signup and view all the answers

<p>When immiscible liquids are combined, they do not mix but rather separate into distinct layers.</p> Signup and view all the answers

<p>Irreversible changes are changes that cannot be undone to restore the original substance, such as the burning of a candle.</p> Signup and view all the answers

<p>Petrol, diesel, kerosene, and natural gas are obtained from petroleum.</p> Signup and view all the answers

<p>'Solubility' refers to the ability of a substance to dissolve in a solvent, forming a solution.</p> Signup and view all the answers

<p>Temperature increases solubility because higher temperatures provide more energy for solute particles to separate and disperse in the solvent.</p> Signup and view all the answers

<p>Conductors easily transfer heat, while insulators resist heat transfer.</p> Signup and view all the answers

<p>Miscible means that two liquids can mix together to form a homogeneous solution.</p> Signup and view all the answers

<p>The heat caused the metal lid to expand, reducing its tightness on the jar.</p> Signup and view all the answers

<p>Conductors are substances that can easily carry heat or electricity.</p> Signup and view all the answers

<p>Smaller particles dissolve faster than larger particles due to their greater surface area.</p> Signup and view all the answers

<p>Irreversible changes indicate processes where the original substance cannot be recovered, such as burning.</p> Signup and view all the answers

<p>The melting of wax is a reversible change because the wax can solidify again upon cooling.</p> Signup and view all the answers