What is rate of diffusion?

What is rate of diffusion?
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1 Answer

Answer :

The rate of diffusion of a gas is the volume of gas diffusing per unit time.
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Related questions

What is the relationship between rate of diffusion and mass of gas?

Description : What is the relationship between rate of diffusion and mass of gas?

Last Answer : Rate of diffusion is inversely proportional to mass of gas.

State Graham’s law of diffusion.

Description : State Graham’s law of diffusion.

Last Answer : “The rate of diffusion of a gas is inversely proportional to the square root of its density”.

When does diffusion of gases takes place?

Description : When does diffusion of gases takes place?

Last Answer : Diffusion of gases takes place when the gases do not react with one another.

What is meant by diffusion?

Description : What is meant by diffusion?

Last Answer : The random movement of gaseous molecules from the region of higher concentration to the region of lower concentration is known as diffusion.

Give reason: a) During the Bhopal gas tragedy, cockroaches, ants and mosquitoes survived.

Description : Give reason: a) During the Bhopal gas tragedy, cockroaches, ants and mosquitoes survived. b) When there is L.P.G leakage, one is advised to open all doors and windows.

Last Answer : a) During the Bhopal gas tragedy, cockroaches, ants and mosquitoes survived. Methyl Isocyanate is a gas denser than air. Hence it was unable diffuse in the crevices. So these animals survived. b) ... diffusion of the LPG with air molecules is faster. Hence any damage by explosion can be prevented.

Name the gas responsible for Bhopal gas tragedy.

Description : Name the gas responsible for Bhopal gas tragedy.

Last Answer : Methyl Isocyanate which is produced by the chemical combination of phosgene gas and methyl cyanide.

Give reason: a) Burning of kerosene does not produce much smell but when the burning ceases, it produces strong smell. b) Smell of hot food reaches faster then that of cold food.

Description : Give reason: a) Burning of kerosene does not produce much smell but when the burning ceases, it produces strong smell. b) Smell of hot food reaches faster then that of cold food.

Last Answer : a) Burning of kerosene does not produce much smell but when the burning ceases, it produces strong smell. When kerosene is burnt, only few molecules diffuse with air after combustion. But when the ... . Smell of hot food reaches faster because rate of diffusion is faster. Cold food diffuses slowly.

Mention some applications of Boyle’s law in our daily life.

Description : Mention some applications of Boyle’s law in our daily life.

Last Answer : a) Deep sea fishes die when suddenly brought to surface due to low pressure. b) Scuba diver's life is under threat when they suddenly come to surface quickly. c) It is used in daily life situations ... to vehicle tyres. d) We feel pain in the ears when in an aeroplane during take off or landing.

Give reasons: a) Deep sea fishes die when suddenly brought to surface.

Description : Give reasons: a) Deep sea fishes die when suddenly brought to surface.b) Scuba diver’s life is under threat when they suddenly come to the surface quickly. c) Balloons pop when squeezed. d) We feel uneasy pain in the ears during take off and landing of aeroplanes.

Last Answer : a) Deep sea fishes die when suddenly brought to surface. The pressure at the bottom of the sea is more, but the pressure at the surface is less. So due to low pressure the fish dies. ... aeroplanes. When the aeroplane takes off or lands, there is imbalance in pressure inside and outside of eardrum.

How are pressure, volume and mass of a gas related?

Description : How are pressure, volume and mass of a gas related?

Last Answer : The product of the volume and pressure of a given mass of dry gas is a constant.

Give reason: When you exert pressure on air pillow, its size gets reduced.

Description : Give reason: When you exert pressure on air pillow, its size gets reduced.

Last Answer : The volume of air filled in the air pillow decreases as we increase the pressure.

State Boyle’s law

Description : State Boyle’s law

Last Answer : “At constant temperature, the volume of a given mass of dry gas is inversely proportional to its pressure”.

Why are the air bubbles smaller in size in lower layers but grows bigger as they rise up when water is boiled?

Description : Why are the air bubbles smaller in size in lower layers but grows bigger as they rise up when water is boiled?

Last Answer : Lower layers of water exert a lot of pressure on air bubbles. Hence they are smaller in size. But the pressure decreases as bubbles rise to the top. Hence they grow bigger.

Give reason: a) Soda bottles are often labelled “store in cool and dry place”. b) Balloons pops out during hot summer more frequently than in winter. c) During winter football filled with air reduces to its original size when taken outdoors.

Description : Give reason: a) Soda bottles are often labelled “store in cool and dry place”. b) Balloons pops out during hot summer more frequently than in winter. c) During winter football filled with air reduces to its original size when taken outdoors.

Last Answer : a) Soda bottles are often labelled store in cool and dry place . The carbon dioxide filled in soda bottles on exposure to heat, expands because the gas inside the bottle expands as temperature ... . When football is taken out, its temperature decreases so the volume to gas filled also decreases.

What is the relationship between volume and temperature of gases when pressure is kept constant?

Description : What is the relationship between volume and temperature of gases when pressure is kept constant?

Last Answer : Volume of a fixed mass of gas is directly proportional to its absolute temperature.

What happens to the volume when the temperature is reduced to one-half according to Charles’s law?

Description : What happens to the volume when the temperature is reduced to one-half according to Charles’s law?

Last Answer : If the temperature is reduced to one-half, the volume would also be reduced to one-half.

What happens to the volume when the temperature is doubled according to Charles’s law?

Description : What happens to the volume when the temperature is doubled according to Charles’s law?

Last Answer : If the temperature is doubled, the volume would also be doubled.

State Charles’s law.

Description : State Charles’s law.

Last Answer : “At constant pressure, the volume of a fixed mass of a gas is directly proportional to its absolute temperature (Kelvin)”.

What is meant by absolute zero temperature?

Description : What is meant by absolute zero temperature?

Last Answer : The temperature -273^oC is called absolute zero or zero Kelvin.

What happens when a balloon with little air is tied to the mouth of a bottle with hot water? Why?

Description : What happens when a balloon with little air is tied to the mouth of a bottle with hot water? Why?

Last Answer : The balloon increases in size because temperature increases kinetic energy of gas molecules of balloon. This increases the random movement of gas molecules. Hence the volume increases gradually.

Mention the features of gases.

Description : Mention the features of gases.

Last Answer : a) Gases are highly compressible. b) Gases exert pressure equally in all directions. c) Gases mix evenly in all proportions without any mechanical aid. d) Gases are least dense than other two states of matter.

What affects the rate of diffusion?

Description : What affects the rate of diffusion?

Last Answer : I haven’t worked with this in a long time but does mass affect diffusion?

What are the factors affecting the rate of diffusion? -Biology

Description : What are the factors affecting the rate of diffusion? -Biology

Last Answer : answer:

What are the factors that affect the rate of diffusion? -Biology

Description : What are the factors that affect the rate of diffusion? -Biology

Last Answer : answer:

How does the diffusion rate of solids increase ?

Description : How does the diffusion rate of solids increase ?

Last Answer : Applying heat increases the diffusion rate of solids.

What does diffusion rate depend on ?

Description : What does diffusion rate depend on ?

Last Answer : on molecular mass.

Why does the rate of diffusion increase when the temperature increases ?

Description : Why does the rate of diffusion increase when the temperature increases ?

Last Answer : The rate at which a solid , liquid or gaseous object spreads spontaneously across a space at any given time is called the diffusion rate of that object. The rate of diffusion of an ... increases, the rate of diffusion increases as the inter-particle attraction force of the object decreases.

Which of the following factor can affect the rate of diffusion of gases `?`

Description : Which of the following factor can affect the rate of diffusion of gases `?`

Last Answer : Which of the following factor can affect the rate of diffusion of gases `?` A. Thickness of the ... . Pressure of the gases D. All fo the these

Enzymes are different from catalysts in (A) Being proteinaceous (B) Not used up in reaction (C) Functional at high temperature (D) Having high rate of diffusion

Description : Enzymes are different from catalysts in (A) Being proteinaceous (B) Not used up in reaction (C) Functional at high temperature (D) Having high rate of diffusion

Last Answer : Answer : A

Stage efficiency in a leaching process depends on the (A) Time of contact between the solid and the solution (B) Rate of diffusion of the solute through the solid and into the liquid (C) Both (A) and (B) (D) Vapour pressure of the solution

Description : Stage efficiency in a leaching process depends on the (A) Time of contact between the solid and the solution (B) Rate of diffusion of the solute through the solid and into the liquid (C) Both (A) and (B) (D) Vapour pressure of the solution

Last Answer : (C) Both (A) and (B)

The rate of solid-liquid extraction is limited by the (A) Phase change of the solute as it dissolves in the solvent (B) Diffusion of the solute through the solvent in the pores to the outside of the particle (C) Diffusion of the solute from the solution in contact with the particle to the main bulk of the solution (D) All 'a', 'b' & 'c'

Description : The rate of solid-liquid extraction is limited by the (A) Phase change of the solute as it dissolves in the solvent (B) Diffusion of the solute through the solvent in the pores to the outside of the particle (C) ... contact with the particle to the main bulk of the solution (D) All 'a', 'b' & 'c'

Last Answer : (D) All 'a', 'b' & 'c'

Binary distillation involves the mass transfer by __________ at the gas￾liquid interface. (A) Unidirectional diffusion from liquid to gas phase (B) Unidirectional diffusion from gas to liquid phase (C) Either 'a' or 'b' (D) A counter diffusion at an almost equal molar rate

Description : Binary distillation involves the mass transfer by __________ at the gas￾liquid interface. (A) Unidirectional diffusion from liquid to gas phase (B) Unidirectional diffusion from gas to liquid phase (C) Either 'a' or 'b' (D) A counter diffusion at an almost equal molar rate

Last Answer : (D) A counter diffusion at an almost equal molar rate

The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid). (A) √T (B) T (C) T 2 (D) T

Description : The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid). (A) √T (B) T (C) T 2 (D) T

Last Answer : (C) T

Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature? (A) Pore diffusion (B) Film diffusion (C) Ash layer diffusion (D) Chemical reaction

Description : Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature? (A) Pore diffusion (B) Film diffusion (C) Ash layer diffusion (D) Chemical reaction

Last Answer : (B) Film diffusion

Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2 /sec.D1 = diffusion co-efficient; cm2 /sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm3 /sec. V = volume, cm3 .) (A) Reactor dispersion number (D/vL) (B) Reduced time (vt/V) (C) Thiele modulus L √(k/D1 ) (D) None of these

Description : Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2 /sec.D1 = diffusion co-efficient; cm2 /sec L = length of the reactor, cm t = time, sec, v = volumetric ... (D/vL) (B) Reduced time (vt/V) (C) Thiele modulus L √(k/D1 ) (D) None of these

Last Answer : (D) None of these

Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of the catalyst)/(rate if not snowed by pore diffusion), Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus) (A) tan hT/T (B) tan T/T(C) tan hT/tan T(D) None of these

Description : Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of the catalyst)/(rate if not snowed by pore diffusion), Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus) (A) tan hT/T (B) tan T/T (C) tan hT/tan T (D) None of these

Last Answer : (A) tan hT/T

If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion. (A) Film (B) Ash layer (C) Pore (D) None of these

Description : If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion. (A) Film (B) Ash layer (C) Pore (D) None of these

Last Answer : (A) Film

Which of the following may account for the small size of the cells? A- .The rate of diffusion B- The surface area/volume ratio C- The number of mRNAs that can be produced by the nucleus D- All of the above

Description : Which of the following may account for the small size of the cells? A- .The rate of diffusion B- The surface area/volume ratio C- The number of mRNAs that can be produced by the nucleus D- All of the above

Last Answer : All of the above