when a liquid is heated upto a certain temperature,it expands,and when cooled it contracts..true or false,if false correct it
Answers
This statement is correct
Answer:
Liquids "expand" when heated and "contract" when cooled.
The ideal gas law applies to liquids as well as gasses:
where p is the absolute pressure of the gas; V is the volume; n is the amount of substance; R is the universal gas constant; and T is the absolute temperature.
In SI units, p is measured in pascals; V in cubic metres; n in moles; and T in kelvin. R has the value 8.314472 J·K−1·mol−1 in SI units[4]).
Given that the liquid is in an open container, the pressure of the gas/liquid p becomes a constant in the above equation and the volume V varies directly with the temperature T.
Some may think that water "expands" when it becomes ice in violation of the above law, but the actual expansion is secondary to the trapped air bubbles inside the structure of the ice, and not actually in the frozen water itself.
Explanation: