The density of an ideal gas can be doubled by halving the ______________.

Question

Question

This question was previously asked in

RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 1)

Answer 1

Explanation:

Kinetic theory of gases-

The kinetic theory of gases is a theoretical model that describes-
the molecular composition of the gas in terms of a large number of identical tiny particles called molecules.
Further, this theory explains that gas pressure arises due to particles colliding with each other and the walls of the container.
The kinetic theory of gases also defines thermodynamic variables such as temperature,
viscosity, and thermal conductivity, and all these properties are related to the microscopic phenomenon.

An ideal gas is the one that can obey-

Ideal gas equation PV = nRT

Calculation:

Given:-

Pressure = P

Volume = V

Temperature = T

Mass = m

From ideal gas equation:-

PV = nRT

(where, M = mNa and R/Na = K = Boltzman constant)

From the above, the density is inversly proportional to the temperature.

Therefore, The density of an ideal gas can be doubled by halving the Absolute temperature

Hence, option-3 is correct