The Ideal Gas Equation

Q. A gas X at -33°C is heated to 127°C at constant pressure. Calculate the percentage increase in the volume of the gas

Q.

$50c{m}^3$ of hydrogen is collected over water at ${17}^{\circ }C$ and 750 mm Hg pressure. Calculate the volume of dry gas at S.T.P. The water vapour pressure at ${17}^{\circ }C$ is 14 mm Hg.

Q.

Calculate the volume occupied by 2 g of hydrogen at ${27}^{\circ }C$ and 4 atmosphere pressure, if at S.T.P. it occupies 22.4 litres.

Q. For an Ideal Gas number of moles per liter in terms of its partial pressure (P), Gas constant (R) and temperature (T) is $\frac{P}{RT}$.

1. RT/P

2. PT/R

Q. A gas at 240 K is heated to 127 ℃ . Find the percentage change in the volume of the gas(pressure remaining constant).

Q.

One mole of a gas occupies ___ L at S.T.P.

Q.

At $0^{\circ }C$ and 760 mm Hg pressure, a gas occupies a volume of $100c{m}^3$ . Temperature Of the gas is increased by one fifth and the pressure is increased one and a half times. Calculate the finalvolume of the gas.

Q. Explain the working principle of a pressure cooker

Q.

State the following:
(a) Volume of a gas at 0 Kelvin.
(b) Absolute temperature of a gas at $7^{\circ }C.$
(c) gas equation.
(d) Ice point in absoulute temperature.
(e) S.T.P. conditions

Q.

If is found, on heating a gas, its volume increase by 50% and pressure decreases to 60% of its original value. If the original temperature was$-{15}^{\circ }C$, find the temperature to which is was heated?

Q.

Calculate the final volume fo a gas X if the original pressure of the gas, at S.T.P. is doubled and its temperatue is increased three times.

Q.

What variables influence the increase of water in capillaries?

Q.

Calculate the volume of dry air at S.T.P. that occupies $28c{m}^3$ at ${14}^{\circ }C$ and 750 mm Hg pressure when saturated with water vapour. The vapour pressure of water at ${14}^{\circ }C$ is 12 mm Hg.

Q.

What temperature would be necessary to double the volume of a gas, initially at S.T.P., If the pressure is decreased to 50%

Q. Question:
At constant pressure a gas at -33 degree Celsius is heated to 127 degree Celsius. Find the percentage increase in the volume of gas.

Q.

22.4 litres of a gas weighs 70 g at S.T.P. Calculate the weight of the gas if it occupies a volume of 20 litres at ${27}^{\circ }C$ and 700 mm Hg of pressure.

Q.

Is it possible to change the temperature and pressure of a fixed mass of gas without changing its volume? Explain your answer.

Q.

It is required to reduce the volume of a gas by 20% by compressing it at a constant pressure. To do so the gas has to be cooled. If the gas attains a final temperature of 157 degrees C, find the initial temperature of the gas.

Q.

Assertion: At constant pressure, if the temperature of a gas is changed from 10 $°$C to 20 $°$C, then the volume of gas is doubled.

Reason: At constant pressure, the volume of any gas is directly proportional to its absolute temperature.

1. (A) is true, but (R) is false

2. (A) is false, but (R) is true

3. Both (A) and (R) are true, and (R) is correct explanation of (A).

4. Both (A) and (R) are true, but (R) is not a correct explanation of (A).

Q.

The compressibility factor for an ideal gas is

1. 1.5

2. 1.0

3. 2.0

4. ∞

Q. The ideal gas law holds true at pressure and temperature.

1. low
2. high
3. moderate
4. all

Q. In ideal conditions, PV/T is for a fixed mass (moles) of a gas.

1. constant
2. variable
3. independent of

Q.

A gas occupies a volume of $300cc$ at ${27}^{\circ }$C and $620mm$ pressure. Find the volume of the gas at ${47}^{\circ }$C and $640mm$.

1. $310cc$

2. $260cc$

3. $390cc$

4. $450cc$

Q. In ideal conditions, PV/T is for a fixed mass (moles) of a gas.

1. constant
2. variable
3. independent of

Q. Match the parameter that is kept constant in the respective laws.

1. Pressure
2. Temperature
3. Volume

Q.

Which is correct about Ideal gas?

1. $\frac{V_1}{T_1}=\frac{V_2}{T_2}$

2. $P_1{V}_1=P_2{V}_2$

3. $\frac{P_1{V}_1}{T_1}=\frac{P_1{V}_2}{T_2}$

4. $V_1{T}_1=V_2{T}_2$

Q. If the density of a certain gas at 30^° C and 760torrr is 1.35 kg /m3 its density at STP is

Q.

The volume occupied by 10g of Oxygen at $0^{o}C$ and 2 atm pressure will be approximately

1. 3.5L

2. 1.5L

3. 20L

4. 4.48L

Q. The pressure of $2L$ of $O_2$ gas is doubled when its temperature is increased from 300 K to 600 K. Find the final volume of the gas.

1. 4 L
2. 40 L
3. 20 L
4. 2 L

Q. 2 litres of gas is enclosed in a vessel at a pressure of 760 mm Hg. If the temperature remains constant, calculate the pressure when volume changes to 4 $d{m}^3$.