Explain why there is no rise in temperature of a substance when it undergoes a change of state although it is still being heated .NH3 AND HCL GASES ARE BOTH PUNGENT SMELLING IN NATURE . THESE ARE RELEASED FROM THE TWO OPPOSITE CORNERS IN A ROOM . WHICH GAS WILL REACH FIRST TO THE PERSON SITTING IN THE CENTRE OF THE ROOM?

Open in App

Solution

Dear student,
1.During the change of state the heat energy given to the substance is utilized in overcoming the forces of attraction between the molecules. That is why there is no rise in temperature.
2.To a person sitting in the centre of the room the smell of ammonia (NH₃) will reach the person first because the rate of diffusion of ammonia is more. rate of diffusion is inversely proportional to molar mass .More the mass lesser the rate of diffusion

Suggest Corrections

Similar questions

Q. Ammonia and hydrogen chloride gases are both pungent smelling in nature. Both the gases are released seperately from two opposite corners of the room. Which gas will reach first to a person sitting in the centre of the room ?

Ammonia and hydrogen chloride gases are both payment smelling in nature These are released from the two corner of room.Which gas will reach a person sitting in the centre of the room?

Explain why there is no rise in temperature of a substance when it undergoes a change of state through heat is supplied continuously.

Q. Explain why, there is no rise in temperature of a substance when it undergoes a change of state though heat is supplied continuously.

Q. Assertion :Vapor in its natural state is a solid or liquid at room temperature . Reason: Gas in its natural state at room temperature would still be a gas.

Join BYJU'S Learning Program