Question

If a gas expands at constant temperature, it indicates that

(1) Number of the molecules of gas increases
(2) Kinetic energy of molecules decreases
(3) Pressure of the gas increases
(4) Kinetic energy of molecules remains the same​

Answer 1

Answer:

3 option

because RMS velocity of gas increases when temperature increases... so collisions increases and pressure increases

Answer 2

If a gas expands at a constant temperature, this indicates the "number of the molecules" of gas increases as gas expands.

Answer: Option (1)

Explanation:

The number of gas molecules increases and hence the gas expands at that temperature. The ideal gas law is Boyles and Charles law. This law is better explained by PV = NRT.

Where P=Pressure, V=Volume, T=Temperature and R= Gas constant. N is a number of gas molecules. Hence the gas expands at a "constant temperature". This concept is widely used in various concept and the various industrial set is done on this concept for large scale production.