Establish the combined form of Boyle’s law and Charles’ law.
WBBSE
Class X
Physical Science
Behaviour of Gases
03 Mark
2022
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
1/12
Q.
At a pressure of 770 mm Hg, a fixed mass of hydrogen gas occupies a...
A.
Initial pressure (P1) = 770 mm Hg Initial volume (V1) ...
Q.
Mention a phenomenon by which it can be said that the gas molecules are in...
A.
Phenomenon: Brownian motion shows that gas molecules are in constant motion. Two...
Q.
What is an ideal gas? What is the effect of the increase in temperature on...
A.
A gas which obeys Boyle’s law, Charles’ law and Avogadro’s law for...
Q.
State Avogadro’s law. Use simple calculation to show that moist air is lighter than dry...
A.
Avogadro's Law : Equal volumes of all gases at the same temperature...
Q.
The coefficient of linear expansion of aluminium is 24×10-6 ºC-1. What would be its value...
A.
Coefficient of linear expansion of aluminium = 24 × 10⁻⁶ °C⁻¹. Since...
Q.
Write down the correlation between absolute temperature and density of gas.
A.
Density (ρ) ∝ 1/Temperature (T), when pressure is constant.
Q.
The value of the ratio of the volume coefficient to the pressure coefficient of an...
A.
(d) 1 Explanation For an ideal gas, the ratio of the volume...
Q.
Draw I-V graph according to ohm’s law in the case of a metallic conductor.
A.
I-V graph
Q.
At a certain pressure the volume of a fixed mass of a gas at a...
A.
The increase in volume is Yo/273.
Q.
What is the value of PV for 4 g of H2 gas at STP? (H...
A.
b. 2 RT Explanation: Number of mole (n) = 4/2 = 2...
Q.
Write down the ideal gas equation for 1 mol gas.
A.
PV=RT (where, n = 1)
Q.
What are constants in Charles’ law?
A.
In Charles' law, the constants are pressure and the mass of gas....