Effect of Change of Temperature on State Change of Matter

Q.

Convert the temperature of 573 K to Celsius scale.

Q.

Question 1
Why does a desert cooler cool better on a hot dry day?

Q.

Suggest two methods to liquefy atmospheric gases?

Q.

Write the relation between Kelvin scale and Celsius scale of temperature.

Q.

Convert the temperature of 373${}^{\circ }$ C to the Kelvin scale.

Q.

Would you cool a bucket of water more quickly by placing it on ice by placing ice in it ?Give reasons for your answer.

Q.

Which contains more heat, 1 kg of ice at 0 C or 1 kg of water at 0 C? Give reason for your answer.

Q. Why people sprinkle water on the roof after a hot sunny day?

Q.

Differentiate between the following: Melting and Freezing

Q.

The kelvin temperature in 270 K. What is the corresponding Celsius scale temperature ?

Q.

The Kelvin scale temperature is 0 K. What is the corresponding Celsius scale temperature ?

Q.

Choose the correct statement of the following.

1. Conversion of solid into vapors without passing through the liquid state is called sublimation.

2. Conversion of vapors into solid without passing through the liquid state is called vaporization.

3. Conversion of vapors into solid without passing through the liquid state is called freezing.

4. Conversion of solid into liquid is called sublimation.

Q.

Explain "Latent heat of fusion."

Q.

The boiling point of water is ${100}^{\circ }$ C. Express this in SI units (Kelvin scale).

Q. What is the boiling point of liquid ammonia?

1. - 33.5 degree celsius
2. -40 degree celsius
3. 0 degree celsius
4. -10 degree celsius

Q. (1)What happens to heat energy which is supplied to solid when it starts melting
(2)at what temp. in kelvin scale does water boil
(3)what happens when we supply heat energy to water it changes its state what is this heat energy called?

Q. pressure and temperature determine the state of substance.expain this in detial.

Q.

Why do we sweat more on a humid day?

Q.

Latent heat of fusion for ice is :-

1. 80 cal / gm

2. 19 J cal^–1

3. 80 gm cal^–1

4. 20 J cal^–1

Q.

A gas can be best liquefied by

1. Lowering the temperature

2. Increasing the temperature

3. Increasing the pressure

4. Increasing the pressure and lowering the temperature

Q.

What is the (a) common unit of temperature, and (b) SI unit of temperature?

Q.

What is the Principle of Freezing?

Q.

Liquefaction of gases is the process by which substances in their gaseous state are converted into the liquid state. Explain

Q. The electric bulb on long use forms a black coating on its inner surface. The process is associated with

1. 
   melting of tungsten
2. 
   sublimation of tungsten
3. 
   reduction of tungsten
4. 
   condensation of tungsten

Q.

Solids and liquids are collectively known as condensed phases . Explain

Q. Question 1 (b)
Convert the following Temperature to Celsius scale:
b. 573 K

Q. Why clothes get dry faster on a Sunny day than a hot humid day?

Q.

Define the following terms :

(a) Condensation (b) Freezing

Q.

Are the melting point of ice and freezing point of water the same?

Q.

The boiling point of ethane is, -${88}^{\circ }$C. This temperature will be equivalent to :

(a) 2852 K (b) 288 K (c) 185 K (d) 361 K