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What is the effect of heating on the rate of diffusion?
It first increases and then, decreases after some time.
It increases with increase of temperature
It decreases with increase of temperature
There is no effect of temperature on the rate of diffusion.
It increases with increase of temperature
Diffusion is the movement of particles from a region of higher concentration to a region of lower concentration. Heating increases the kinetic energy of particles, causing them to move faster and collide more frequently, which directly increases the rate of diffusion.
Diffusion is the movement of particles from a region of higher concentration to a region of lower concentration. Heating increases the kinetic energy of particles, causing them to move faster and collide more frequently, which directly increases the rate of diffusion.
The scent of a hot cup of coffee spreads across a room much faster than the scent of a cold beverage because the heat energizes the volatile molecules to zip through the air more rapidly.
HOT: Heat-induced, Organized-particles-move-faster, Transference-increases
KE=23тАЛkBтАЛT тАФ where KE is kinetic energy, kBтАЛ is Boltzmann constant, and T is temperature
vrmsтАЛ=M3RTтАЛтАЛ тАФ where vrmsтАЛ is root mean square velocity, R is ideal gas constant, and M is molar mass
According to the Kinetic Molecular Theory, the average kinetic energy of particles is directly proportional to the absolute temperature (K.E.тИЭT). As temperature rises, the velocity of the particles increases (vтИЭTтАЛ), resulting in a faster rate of intermixing of particles in liquids and gases.
Diffusion occurs in gases, liquids, and solids, though it is fastest in gases.
Higher temperatures lead to increased molecular collisions.
Diffusion is a passive process requiring no external work, driven solely by the concentration gradient and thermal energy.
Efficient mixing of substances without mechanical agitation.
Crucial for biological gas exchange (e.g., oxygen in alveoli).
Diffusion is a slow process over long distances compared to convection or forced flow.
Scent of incense sticks spreading in a room.
Oxygen diffusion into blood through lung membranes.
Graham's Law of Diffusion states that the rate of effusion or diffusion is inversely proportional to the square root of the molar mass (rтИЭMтАЛ1тАЛ).
Option A is incorrect because diffusion does not decrease after an initial increase. Option C is incorrect as it describes the opposite of kinetic theory. Option D is incorrect as temperature is a primary variable affecting molecular motion.
B is correct тАФ Heating increases the kinetic energy of particles, which accelerates their motion and consequently increases the rate of diffusion.
Always remember that in exams, any process involving 'molecular motion' is almost certainly temperature-dependent, increasing as T increases.
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