EASY
Earn 100

What do you mean by specific latent heat?

Important Questions on Thermal Physics

MEDIUM
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
Which of the following curves best represents the variation in density of water with temperature?
EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
The melting point of ice is _____.
MEDIUM
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
Useful substance in preparation of freezing mixture is 
EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
"Complete melting of ice cream will not happen suddenly". Explain.
MEDIUM
Physics>Waves and Thermodynamics>Thermal Physics>Change of State

When does ice melt at the same temperature 0°C(273 Kelvin), which one of the following has more energy?

HARD
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
The melting point of naphthalene is 80°C and the room temperature is 30°C. A sample of liquid naphthalene at 100°C is cooled down to the room temperature. Draw a temperature time graph to represent this cooling. In the graph, mark the region which corresponds to the freezing process.
MEDIUM
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
Draw a sketch showing the effect of heat on the interparticle spacing and physical states of matter.
EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
What is known as its boiling point?
HARD
Physics>Waves and Thermodynamics>Thermal Physics>Change of State

Why is steam at 100°C a more effective heating agent than water at 100°C?

EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State

Define the latent heat of fusion of ice. Give its value.

EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
A bulk phenomenon in which particles from whole of the liquid change into vapour state is called -
EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
The temperature at which a solid melts to become a liquid at the atmospheric pressure is called _______.
EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
What is known as fusion?
MEDIUM
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
Why is ice at 273 K more effective in cooling than water at the same temperature?
EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
The melting point of ice is?
MEDIUM
Physics>Waves and Thermodynamics>Thermal Physics>Change of State

Convert the following temperatures to the Kelvin scale:

a. 25°C

b. 373°C? 

EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
What is the physical state of water at 250oC  ?
MEDIUM
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
When we observe the melting of ice, the melting point of ice is a constant temperature at which
EASY
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
The amount of heat energy that is required to change 1 kg of a solid into liquid at atmospheric pressure at its melting point is known as _______.
MEDIUM
Physics>Waves and Thermodynamics>Thermal Physics>Change of State
While determining the boiling point of water in the laboratory, the beaker containing hot water accidentally fell on the hand of a student. A fellow student immediately put cold water on his hand and then placed ice cubes on his hand. He then took the student to the school dispensary for giving him first aid.
A. Define boiling point.
B. Why does temperature remain constant during boiling?
C. How does boiling differ from evaporation?
D. State the values displayed by the fellow student.