Diffusion in Solids Liquids and Gases
Chemistry ⇒ States of Matter
Diffusion in Solids Liquids and Gases starts at 8 and continues till grade 12.
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A student places a copper rod in contact with a zinc rod at high temperature. After several days, atoms of both metals are found to have mixed at the interface. What process is responsible for this?
Describe how the rate of diffusion changes with increasing molecular mass of the diffusing substance.
Describe the difference between diffusion and osmosis.
Explain why diffusion is a passive process.
A gas takes 20 seconds to diffuse through a porous plug. Another gas takes 80 seconds under identical conditions. What is the ratio of their molar masses?
A student places a copper rod in contact with a zinc rod at high temperature. After several days, atoms of both metals are found to have mixed at the interface. What process is responsible for this?
In a laboratory, a student observes that a drop of ink spreads faster in hot water than in cold water. Explain why this happens.
A scientist places a drop of bromine liquid at the bottom of a sealed glass jar filled with air at room temperature. After several hours, the entire jar appears reddish-brown. Explain the process responsible for this observation and discuss the factors that could affect the rate at which the color spreads.
Diffusion occurs fastest in which state of matter? (1) Solid (2) Liquid (3) Gas (4) Plasma
Which law relates the rate of diffusion of gases to their molar masses? (1) Boyle's Law (2) Charles's Law (3) Graham's Law (4) Dalton's Law
Which of the following best explains why gases diffuse faster than liquids? (1) Gases have higher density. (2) Gas particles move more rapidly and are farther apart. (3) Gases are heavier than liquids. (4) Gases have stronger intermolecular forces.
Which of the following factors does NOT affect the rate of diffusion? (1) Temperature (2) Concentration gradient (3) Color of the substance (4) Molecular size
According to Graham's Law, the rate of diffusion of a gas is inversely proportional to the ________ of its molar mass.
Diffusion in solids is often observed in the process of ________ when two metal blocks are kept in contact at high temperature for a long time.
Fill in the blank: The random movement of particles that leads to diffusion is due to their ________ energy.
The process by which the particles of two substances mix due to their kinetic energy is called ________.
State True or False: The rate of diffusion increases with an increase in concentration gradient.
True or False: Diffusion can occur in solids, liquids, and gases.
True or False: Diffusion in liquids is generally faster than in solids but slower than in gases.
True or False: Diffusion is responsible for the exchange of gases in the lungs.
