Heat

Q.

What do you mean by latent heat of fusion? What is the value of latent heat of fusion of ice in SI units?

Q.

The process of gases converting into Liquid Upon cooling is called condensation

1. True
2. False

Q.

Name the following

The process by which a gas changes into a liquid

Q.

Define latent heat of fusion. Specify this value for water.

Q. When two substances A and B are powdered together in a pestle and mortar, a large amount of heat is released and a new substance C is formed. What is the nature of the new substance?

1. Compound
2. Mixture
3. Element
4. None of the above

Q.

What is the latent heat of fusion of a solid? How much is the latent heat of fusion of ice in SI units?

Q. Rhea observed tiny droplets of water being formed on the surface of a cold juice bottle placed outside the refrigerator due to:

1. Condensation
2. Boiling
3. Melting
4. Freezing

Q.

The process of condensation is the reverse of
-------------------------.

Q.

On heating the rod, the length of the rod increases. Increase in the length of rod depends upon ______

1. The material of the rod

2. The length of the original rod

3. The increase in its temperature

4. All the above

Q.

What are latent heat and triple points? Explain.

Q.

what is latent heat of fusion of ice and vaporisation of steam?

Q. Latent heat of vaporisation of water is equal to the latent heat of fusion of ice.

1. True
2. False

Q.

The amount of heat required by a substance to change its state without any change in temperature is called?

Q.

Define Condensation.

Q.

Why does the temperature remain constant during the change of state for any substance?

Q.

How is liquefaction different from condensation?

Q. When a gas loses its thermal energy and converts into a liquid form, it is known as:

1. Evaporation
2. Vaporisation
3. Sublimation
4. Condensation

Q. Calculate the required heat to melt 5kg of ice at O(degree)C. Specific latent heat of fusion of ice =336000J/kg.

Q.

what state of matter is fire

Q. In chemistry i saw that in one sentence 350 or 330 kJ was there what does this kJ mean

Q.

Which of the following is correct about fire?

Fire is -

1. Only matter

2. State of matter

3. Matter undergoing a reaction

4. None of the above