Question

At temperature -273°C, the speed of molecules of gas is (A) maximum (B) minimum (C) zero (D) infinite

Answer 1

At temperature -273°C, the speed of molecules of a gas is zero.

Explanation:

• -273° C is known as the absolute temperature.
• It is the temperature at which it is assumed that the Kinetic Energy of molecules is zero.
• As kinetic energy become zero, therefore there is no movement of molecules of gases at this temperature.
• Thus, the speed of molecules of gas at -273°C is zero.

Answer 2

Answer:

At temperature -273°C, the speed of molecules of gas is zero.

Explanation:

The Kelvin scale, being thermodynamic in measurements, denotes 0 K to be the temperature at which all molecular motion stops.

We can convert 0 K to -273°C.

Thus, we understand that all molecular motion is frozen at -273°C.

This occurs because, at this temperature, the Kinetic Energy of all the molecules is said to be zero, and because there is no energy transfer among molecules the movement speed of the molecules becomes zero.

We also note here that the Kinetic Energy of a substance is in virtue of its motion.

#SPJ2