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Molecules in a liquid are engaged in random thermal motion; they move around at random, bouncing off each other constantly. The temperature measures the amount of this motion. At higher temperatures, they are moving faster. At lower temperatures they move more slowly. Of course, at some point you also get phase changes. Increase the temperature sufficiently and the liquid will boil; decrease it sufficiently and (with the exception of helium) it will freeze.
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Which of the following factors affect the vapour pressure of a liquid?
Type of molecule: intermolecular forces between molecules are: * relatively strong, the vapor pressure will be relatively low. * relatively weak, the vapor pressure will be relatively high. Temperature: * higher temperature, more molecules have enough energy to escape from the liquid or solid. * lower temperature, fewer molecules have sufficient energy to escape from the liquid or solid.
What will happen if you keep increasing the temperature of a liquid?
As the temperature of a liquid increases, its molecules will move faster and farther apart, causing the liquid to expand and eventually boil and turn into a gas.
What phase is 2H2O?
2H2O represents two molecules of water, which is in liquid phase at room temperature and pressure.
What can change the solubility of a solid in a liquid?
temperature. The higher the temperature of the liquid, the more of the solid you can dissolve in it.
What is the term for the movement of molecules within a liquid?
All molecules are in constant motion. Molecules of a liquid have more freedom of movement than those in a solid. Molecules in a gas have the greatest degree of motion. Heat, temperature and the motion of molecules are all related. Temperature is a measure of the average kinetic energy of the molecules in a material. Heat is the energy transferred between materials that have different temperatures. Increasing the temperature increases the translational motion of molecules Energy is related to temperature by the relationship: E= kT
What 2 factors affect the behavior of liquids?
Two factors that affect the behavior of liquids are temperature and pressure. Temperature influences the movement of molecules within the liquid, affecting viscosity and evaporation rate. Pressure can influence the boiling point and compressibility of the liquid.
How does temperature affect liquids?
Temperature affects liquids by influencing their molecular movement. As temperature increases, molecules in a liquid gain energy and move more quickly, causing them to spread out and the liquid to expand. Conversely, decreasing temperature causes molecules to slow down, leading to contraction and density increase.
How does temperature affect the volume of liquid?
Temperature affects the volume of liquid through thermal expansion. When the temperature increases, the kinetic energy of the molecules in the liquid increases, causing them to move faster and spread out, resulting in an increase in volume. Conversely, when the temperature decreases, the molecules have less kinetic energy and move closer together, leading to a decrease in volume.
When the temperature of an object decreases what happens to the molecules?
In every liquid (with the exception of water) the molecules, when the temperature decreases, contract.
Does evaporation rais the tempeature of a liquid?
No, evaporation does not raise the temperature of a liquid. Evaporation is a cooling process where the most energetic molecules escape from the liquid surface, leaving behind molecules with lower average kinetic energy, which lowers the overall temperature of the liquid.
How do increasing the temperature of a liquid affect the dissolving of a substance?
because you are breaking apart either the dipole bond or hydrogen bond molecules within the substance
Which of the following factors affect the vapour pressure of a liquid?
Type of molecule: intermolecular forces between molecules are: * relatively strong, the vapor pressure will be relatively low. * relatively weak, the vapor pressure will be relatively high. Temperature: * higher temperature, more molecules have enough energy to escape from the liquid or solid. * lower temperature, fewer molecules have sufficient energy to escape from the liquid or solid.
Why a liquid is less viscous at high temperature?
When the liquid is at high temperature, the molecules of liquid have more energy & spread further apart. This enables the molecules to move around much more in the liquid which makes it less viscous or fluid.
How does temperature affect vapor pressure?
Temperature directly affects vapor pressure by increasing the kinetic energy of molecules in a liquid, allowing more molecules to escape into the gas phase. As temperature increases, molecules evaporate more readily, leading to higher vapor pressures. Conversely, decreasing temperature reduces vapor pressure by slowing down the rate of evaporation.
Does the temperature of a liquid change due to evaporation?
Yes, it decreases. This is because the molecules of the liquid which have higher kinetic energy escape from the liquid, leaving the liquid with molecules having lower kinetic energy. The temperature of any substance is proportional to the kinetic energy of its molecules.
Which diotomic molecules are a liquid at room temperature?
Bromine, Br2, is a diatomic molecule that is liquid.
Does the size of molecules affect a liquids resistance?
Yes, the size of molecules can affect a liquid's resistance. Larger molecules tend to have higher viscosity, which is a measure of a liquid's resistance to flow. This is because larger molecules have more intermolecular forces that hinder their movement.
