Recent questions tagged states-of-matter

Calculate the pressure exerted by $10^{23}$ gas molecules each of mass $10^{-22}$ g in a container of volume one litre. The rms speed is $10^5 cm \;sec^{-1}$

asked Feb 15, 2014 by sharmaaparna1

1 answer

Under 3atm , 12.5 litre of a certain gas weigh 15g. Calculate the average speed of gaseous molecules.

asked Feb 15, 2014 by sharmaaparna1

1 answer

A 4:1 molar mixture of He and $CH_4$ is contained in a vessel at 20 bar pressure. Due to a hole in the vessel, the gas mixture leaks out. What is the composition of the mixture effusing out initially?

asked Feb 15, 2014 by sharmaaparna1

1 answer

The relative rates of diffusion of gas B as compared to that of diatomic gas A is 6.5. Find the molecular weight of B if atomic weight of A is 36.

asked Feb 15, 2014 by sharmaaparna1

1 answer

$20 dm^3$ of $SO_2$ diffuses through a porous partition in 60 Seconds. What Volume be $O_2$ will diffuse under similiar conditions in 30 second?

asked Feb 14, 2014 by sharmaaparna1

1 answer

A gaseous mixture of $O_2 and N_2$ are in the ratio of 1:4 by weight . Calculate their ratio of molecules.

asked Feb 14, 2014 by sharmaaparna1

1 answer

Calculate the total pressure in a mixture of 4g $O_2\;and \;2g\;H_2$ confined in a bulb of 1 litre at $0^{\large\circ}C$

asked Feb 14, 2014 by sharmaaparna1

1 answer

Two gases A and B having molecular weights 60 and 45 respectively are enclosed in a vessel . The weight of A is 0.50g and that of B is 0.2g. The total pressure of the mixture is 750mm. Calculate partial pressure of the two gases.

asked Feb 14, 2014 by sharmaaparna1

1 answer

$20\% N_2O_4$ molecules are dissociated in a sample of gas $27^{\large\circ}$ and 760 torr. Calculate the density of the equilibrium mixture.

asked Feb 14, 2014 by sharmaaparna1

1 answer

If $10^{-4} dm^3$ of water is introduced into a $1.0dm^3$ flask to 300K. How many moles of water are in the vapour phase when equilibrium is established? (Given Vapour pressure of $H_2O$ at 300K is 3170 Pa ; $R = 8.314JK^{-1}mol^{-1}$

asked Feb 14, 2014 by sharmaaparna1

1 answer

The ratio of the rate of diffusion of helium and methane under identical conditions of pressure and temperature is

asked Feb 14, 2014 by sharmaaparna1

1 answer

The root mean square speed of one mole of a monoatomic gas having molecular mass M is $U_{rms}$. The relation between the average kinetic energy (E) of the gas and $U_{rms}$ is:

asked Feb 14, 2014 by sharmaaparna1

1 answer

Positive deviations from ideal gas behaviour takes place because

asked Feb 14, 2014 by sharmaaparna1

1 answer

When the temperature is increased surface tension of water

asked Feb 14, 2014 by sharmaaparna1

1 answer

The root mean square speed of an ideal gas at constant pressure varies with density d as

asked Feb 13, 2014 by sharmaaparna1

1 answer

At $100^{\large\circ}C$ and 1 atm , if the density of liquid water is 1.0g $cm^{-3}$ and that of water vapour is $0.0006gcm^{-3}$ , then the volume occupied by water molecules in 1 litre of stream at that temperature is :

asked Feb 13, 2014 by sharmaaparna1

1 answer

The rms velocity of hydrogen is $\sqrt7$ times the rms velocity of nitrogen. If T is the temperature of the gas, then

asked Feb 13, 2014 by sharmaaparna1

1 answer

The compressibility of gas is less than unity at S.T.P .Therefore

asked Feb 13, 2014 by sharmaaparna1

1 answer

A gas will approach ideal behaviour at :

asked Feb 13, 2014 by sharmaaparna1

1 answer

According to Graham's law , at a given temperature , the ratio of rates of diffusion $\large\frac{r_A}{r_B}$ of gases A and B is given by:

asked Feb 13, 2014 by sharmaaparna1

1 answer

The Compressibility factor for an ideal gas is

asked Feb 13, 2014 by sharmaaparna1

1 answer

X mL of $H_2$ gas effuses through a hole in a container is 5 Second. The time taken for the effusion of the same Volume of the gas Specified below under identical conditions is

asked Feb 13, 2014 by sharmaaparna1

1 answer

The ratio between the rms Speed of $H_2$ at 50K and that of $O_2$ at 800K is :

asked Feb 12, 2014 by sharmaaparna1

1 answer

In Van der waal's equation of state of the gas law the constant 'b' is a measure of :

asked Feb 12, 2014 by sharmaaparna1

1 answer

As the temperature is raised from $20^{\large\circ}C \;to \;40^{\large\circ}C$ , the average kinetic energy of neon atoms changes by a factor.

asked Feb 12, 2014 by sharmaaparna1

1 answer

According to kinetic theory of gases in an ideal gas between two successive collisions a gas molecule travels:

asked Feb 12, 2014 by sharmaaparna1

1 answer

For an ideal gas , number of moles per litre in terms of its pressure P , gas constant R and temperature T is

asked Feb 12, 2014 by sharmaaparna1

1 answer

Kinetic theory of gases proves

asked Feb 12, 2014 by sharmaaparna1

1 answer

Value of gas Constant R is

asked Feb 12, 2014 by sharmaaparna1

1 answer

Calculate the density of $CO_2\; at \;100^{\large\circ}C$ and 800mm Hg pressure.

asked Feb 12, 2014 by sharmaaparna1

1 answer

Calculate the weight of $CH_4$ in a 9 litre cylinder at 16 atm and $27^{\large\circ}$ (R = 0.08 litre atm $K^{-1}$)

asked Feb 11, 2014 by sharmaaparna1

1 answer

Calculate the temperature at which 28g $N_2$ occupies a volume of 10 litres at 2.46 atm.

asked Feb 11, 2014 by sharmaaparna1

1 answer

Calculate the volume occupied by 7g $N_2$ at $27^{\large\circ}$ and 750mm of Hg.

asked Feb 11, 2014 by sharmaaparna1

1 answer

An iron cylinder contains helium at a pressure of 250 Kpa at 300K. The cylinder can withstand a pressure of $1\times10^6 Pa$ . The room in which cylinder is placed catches fire. Predict whether the cylinder will blow up before it melts or not . melting point of cylinder = 1800K

asked Feb 11, 2014 by sharmaaparna1

1 answer

Ask Questions, Get Answers