Henry's Law

Q.

What is the difference between Henrys law and Raoults law?

Q.

Explain why soft drink bottles are sealed under high pressure.

Q.

A 10 g of a gas at atmospheric pressure is cooled from $273{}^{\circ }Cto{0}^{\circ }C$ keeping the volume constant, its pressure would become

1. atm

2. atm

3. 

4. 

Q.

In an experiment during the analysis of a carbon compound, 145 l of $H_{2}O$ was collected at 760 mm Hg pressure at ${27}^{\circ }$ C temperature. The mass of $H_{2}O$ is nearly.......

1. 12 g

2. 10 g

3. 24 g

4. 6 g

Q. Show that N2O, NO2, NO illustrate law of multiple proportions

Q.

What is the term used for the solution that obeys Raoults law?

Q.

The Henry's law constant for the solubility of N₂ gas in water at 298K is 1.0 x 10⁵ atm. The mole fraction of N₂ is 0.8. The number of moles of N₂ from air dissolved in 10 moles of water at 298K and 5 atm pressure is

1. 4 x 10^-4

2. 4 x 10^-5

3. 5 x 10^-4

4. 4 x 10^-6

Q.

the percentage by weight of methanol in a mixture of methanol and ethanol is 50 percent. therefore, the mole fraction of methanol in the mixture is

Q. The Henry's law constant for the solubility of $N_2$ gas in water at $298K$ is $1\times {10}^5$atm. The mole fraction of $N_2$ in air is $0.8$. Calculate the number of moles of $N_2$ dissolved in $10moles$ of water at $298K$ and $5atm$.

1. $4\times {10}^{-5}$
2. $5\times {10}^{-4}$
3. $3\times {10}^{-5}$
4. $4\times {10}^{-4}$

Q. 20g of N2 is compressed adiabatically from 20dm3 to 10dm3. calculate final temperature, q, w, Δu, ΔH

Q. The solubility of a gas in a liquid is directly proportional to the partial pressure of the gas. This is in accordance with

1. Ostwald's law
2. Henry law
3. Raoult's law
4. van' t Hoff law
   

Q. 10. A gaseous mixture contains equal volumes of O2 and He. What is the mole fraction of He in in the mixture?

Q. Henry’s law constant is constant irrespective of gas. (T/F)

1. True
2. False

Q. Henry’s law constant is constant irrespective of gas. (T/F)

1. True
2. False

Q. Ratio of Henry’s constant, $K_H$ of two inert gases A $\&$ B is 2 at a given temperature. A mixture containing 4 moles of gas A and 8 moles of gas B is bubbled through water covered from top and solution is allowed to attain equilibrium. Assuming the absence of any other gases, what will be the ratio of mole fractions of gases in the solution.

1. 1:1
2. 8:9
3. 7:8
4. 1:2

Q. Out of stormy day and sunny day, which day would have more solubility of $O_2$ in water?

1. Stormy day
2. Sunny day
3. Dry day
4. Cold day

Q. The Henry's law constant for the solubility of $N_2$ gas in water at 298 K is $1.0\times {10}^{5}atm$. The mole fraction of $N_2$ in air is 0.8. The no. of moles of $N_2$ in 10 moles of water of 298 K and 5 atm pressure is:

1. $9\times {10}^{-6}$
2. $2\times {10}^{-5}$
3. $4\times {10}^{-4}$
4. $6\times {10}^{-5}$

Q.

One mole of an ideal gas undergoes a change of state (2.0atm, 30L, 95K)$\to$ (4.0atm, 5.0L, 245K) with change in internal energy $\Delta E=30.0Latm$.The change in enthalpy of the process in L atm is

1. $40.0$
2. $-10.0$
3. $-30.3$
4. Not defined, because it is not constant.

Q. what is meant by the notion delta S_universe ? how are spontaniety of a process and equilibrium state of the process related to delta S_universe ? point out the limitation of entropy criterion of sponteniety.

Q. In a equation if one is aq sol. and other is gaseous then for calculating the partial pressure , is ? partial pressure of aqueous sol. Is also considered or not. then to find the parti

Q. Why law of definite proportion is not valid for 4g of H2 and 32g of oxygen

Q. When $Fe\left(s\right)$ is dissolved in aqueous $HCl$ in a closed vessel, the work done is 0.