30 Questions
What is the pressure of a gas at 0°C, given that K is the constant and V0 is the volume at 0°C?
P = K × 273.15
What is the molar volume of a gas at S.T.P./N.T.P. conditions?
22.414 L
What is the expression for the pressure of a gas in a column, given the height of the fluid, density of the fluid, and gravity?
Pgas = Patm + h dg
What is the relationship between the volumes of two or more gases at different temperatures, according to Charles' Law?
V1 / V2 = T1 / T2
What is the name of the French chemist who first studied the variation of volume with temperature in 1787?
Jacques Charles
If two gases have rates of diffusion r1 and r2, and the volumes of the gases that diffuse are V1 and V2 respectively, what is the relation between r1, r2, V1, and V2?
r1 / r2 = V1 / V2
What is the application of Graham's law in the separation of isotopes and gaseous mixtures?
Atmolysis
What is the relation between the rate of diffusion (r) and the pressure (P) of a gas?
r ∝ 1/P
What is the term for the number of moles effusing per unit time?
Rate of effusion
What is the term for the decrease in pressure of a cylinder per unit time?
Rate of effusion
What is the relationship between the volume of a gas and its temperature at constant pressure, according to Charle's Law?
V ∝ T
What is the constant of proportionality in the ideal gas equation, PV = nRT, in SI units?
8.3143 J mol⁻¹ K⁻¹
What is the sum of the partial pressures of all gases in a mixture, according to Dalton's Law of Partial Pressures?
The total pressure of the mixture
What is the relationship between the density of a gas and its temperature, according to the ideal gas equation?
d ∝ 1/T
What is the application of Avogadro's Law, which states that V₁/T₁ = V₂/T₂ at constant pressure and moles of gas?
Calculating the volume of a gas at different temperatures
What is the unit of measurement for the volume of a gas?
Litres (L) and millilitres (mL)
What happens to the kinetic energy of gas molecules when the temperature is increased?
It increases
What is the force exerted by a gas per unit area of the container walls?
Pressure
What is the relationship between the temperature and velocity of gas molecules?
Velocity increases with increasing temperature
What is the SI unit of temperature?
Kelvin (K)
What is the primary reason for the high kinetic energy of gaseous molecules?
Due to rapid motion in all directions
What is the characteristic of gases that allows them to be compressed and expanded?
Infinite expansibility
What is the relation between the mass of a gas and the number of moles of the gas?
The mass of a gas is directly proportional to the number of moles
What is the characteristic of gases that allows them to exert pressure?
Gases exhibit perfectly elastic collisions with the container
Why can gases be liquefied?
Due to low temperatures or high pressures
What is the temperature at which molecular motion ceases?
0 K
What is the closest distance between the centres of two molecules taking part in a collision?
Molecular diameter
What is the relationship between the average kinetic energy of a gas and its temperature?
K.E. ∝ T
What is the expression for the kinetic energy of one mole of gas?
3RT
What is the relationship between the pressure and volume of a gas, according to the ideal gas equation?
P ∝ 1/V
Measure the pressure in a system, including gauge pressure and vacuum. Learn about the relationship between pressure and temperature, and how to calculate fluid height in a column.
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