Question

If gas is enclosed in a container which is then placed on a fast moving train. The temperature of the gas ______.
1. Falls
2. Remain unchanged
3. Becomes unsteady
4. Rises

Answer 1

Correct Answer - Option 2 : Remain unchanged

CONCEPT:

• Temperature: The temperature is related to the average kinetic energy of molecules present. It is increased if heat is supplied from outside.
• Ideal Gas Equation: The ideal gas equation is given as

PV = nRT

• P is pressure, V is volume, n is a number of moles, R is gas constant, T is temperature.
• If gas is enclosed in a container which is then placed on a fast-moving train, neither of its pressure, volume, or its number of moles changes as gas is in a container. 

EXPLANATION:

• Since no external heat is supplied, neither any constraints is changing. So, The temperature of the gas will remain unchanged.
• So, remain unchanged is the correct answer.