QQuestion
Establish the combined form of Boyle’s law and Charles’ law.
✓Answer
Let V be the volume of a given mass of gas at pressure P and temperature T (absolute),
From Boyle’s law: V ∝ 1/P (m and T constant)
From Charle’s law: V ∝ T (m and P constant)
By combining two laws we have,
V ∝ T/P or,
V = K T/P (Where K = proportionality constant)
or, PV = KT
or, PV = nRT
Where n is the number of moles of gas, R is the universal gas constant (0.08206 L·atm/mol·K)
Related Questions
More WBBSE Moderate level questions
At a pressure of 770 mm Hg, a fixed mass of hydrogen gas occupies a volume of 75cm at 27°C. What volume will the mass of hydrogen gas occupy at that temperature and 750 mmHg pressure? [2] OR What will be the volume of 64 g of O2 gas (O=16) at a pressure of 2 atmospheres and temperature of 300K? [2] (R = 0.082 litre - atmosphere mol-1K-1)
Mention a phenomenon by which it can be said that the gas molecules are in constant motion. Mention two incorrect postulates of the Kinetic Theory of gas. [1+2]
What is an ideal gas? What is the effect of the increase in temperature on the pressure of a gas kept in a closed container? Answer with reason. [1 + 2]
State Avogadro's law. Use simple calculation to show that moist air is lighter than dry air. [1+2]
The coefficient of linear expansion of aluminium is 24×10-6 ºC-1. What would be its value in the SI unit? OR From which law is the value of the volume expansion coefficient of gas obtained?
Write down the correlation between absolute temperature and density of gas.
The value of the ratio of the volume coefficient to the pressure coefficient of an ideal gas is (a) 1/2 (b) 0 (c) 1/273 (d) 1
Draw I-V graph according to ohm's law in the case of a metallic conductor.
At a certain pressure the volume of a fixed mass of a gas at a temperature of 0°C is Yo; what will be the increase in volume of the gas, according to Charles' law, if the temperature of the gas is raised by 1°C keeping the pressure unchanged?
What is the value of PV for 4 g of H2 gas at STP? (H = 1) RT 2 RT 4 RT 0.5 RT
Write down the ideal gas equation for 1 mol gas.
What are constants in Charles' law? [1] OR Write whether the following statement is True or False: [1] Per degree interval in kelvin scale of temperature is equal to per degree interval in celcius scale.