A certain amount of gas occupies 750 cc at –3°C. The gas is heated at constant pressure till its volume becomes 1 litre. What is its final temperature?
WBBSE
Class X
Physical Science
Behaviour of Gases
02 Mark
2025
Initial Volume (V1) = 750 cc
Initial Temperature (T1) = –3°C = 270 K
Final Volume (V2) = 1000 cc
Final Temperature (T2) = ?
From Charles Law: \text{V₁}\over \text{T₁} = \text{V₂}\over \text{T₂}
T₂ = \text{V₂ × T₁}\over \text{V₁} = \text{1000 × 270}\over \text{750} = 360 K
T₂ = 360 K – 273 K = 87 K
Hence, the final temperature of the gas is 87°C.
Related Questions
More WBBSE Moderate level questions
1/12
Q.
The volume of a certain amount of gas at a temperature of 27°C and at...
A.
Initial Pressure (P₁) = 76 cm Hg Initial Volume (V₁) = 200...
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.
What is the number of molecules present in 16 g of O₂ at S.T.P.?
A.
3.01 × 10²³ molecules Explanation Molar mass of O₂ = 16 ×...
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.
A gas of mass 2 g occupies a volume of 820 ml at 7°C temperature...
A.
Mass of gas (m) = 2 g Volume (V) = 820 ml...
Q.
A fixed mass of gas kept at 0°C is heated. What will be the temperature...
A.
Initial temperature (T₁) = 0°C = 273 K Let initial pressure =...
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.
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.
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.
Draw I-V graph according to ohm’s law in the case of a metallic conductor.
A.
I-V graph