English

What do you understand by the term latent heat? - Physics

Advertisements
Advertisements

Question

What do you understand by the term latent heat?

Answer in Brief

Solution

The heat energy exchanged in change of phase is not externally manifested by any rise or fall in temperature, it is considered to be hidden in the substance and is called the latent heat.

shaalaa.com
  Is there an error in this question or solution?
Chapter 11: Calorimetry - Exercise 11 (B) 1 [Page 280]

APPEARS IN

Selina Physics [English] Class 10 ICSE
Chapter 11 Calorimetry
Exercise 11 (B) 1 | Q 17 | Page 280

RELATED QUESTIONS

Explain the following:

The surrounding become pleasantly warm when water in a lake starts freezing in cold countries.


Explain the following:

The heat supplied to a substance during it change of state, does not cause any rise in its temperature.


The S.I. unit of specific latent heat is ______.


Explain the following temperature vs time graph.


What is meant by latent heat? How will the state of matter transform if latent heat is given off?


Answer the following:

Explain the role of latent heat in the change of state of a substance.


A thermally insulated pot has 150 g ice at temperature 0°C. How much steam of 100°C has to be mixed to it, so that water of temperature 50°C will be obtained? (Given : latent heat of melting of ice = 80 cal/g, latent heat of vaporization of water = 540 cal/g, specific heat of water = 1 cal/g °C)


Explain why water is used in hot water bottles for fomentation and also as a universal coolant.


What happens to the heat supplied to a substance when the heat supplied causes no change in the temperature of the substance?


Calculate the total amount of heat required to convert 100g ice at 0°C to steam at 100°C. 
(Specific latent heat of fusion of ice = 336 J/g, specific latent heat of vaporization of steam = 2260 J/g, specific heat capacity of water = 4.2 J/g°C).


Steam at 100°C is passed over 1000 g of ice at 0°C. After some time, 600 g of ice at 0°C is left and 450 g of water at 0°C is formed. Calculate the specific latent heat of vaporization of steam (Given: specific heat capacity of water = 4200 J/kg°C, specific latent heat of fusion of ice = 336,000 J/kg.)


If there is no Heat loss to the surroundings, the heat released by the condensation of m1 g of steam at 100°C into water at 100°C can be used to convert m2 g of ice at 0°C into water at 0°C.

(i) Find:

(a) The heat lost by steam in terms of m1

(b) The heat gained by ice in terms of m2

(ii) Form a heat equation find the ratio of m2 : m1

Specific latent heat of vaporization of steam = 2268 kJ/kg

Specific latent heat of fusion of ice = 336 kJ/kg

Specific heat capacity of water = 4200 J/kg°C


When ice is converted into water : constant temperature : : before the water evaporates : _______


Find the odd one out and give its explanation.


Write the name.

The phase in which solid substances are converted into liquid.


1 kg of dry air at a temperature of 40 °C can hold a maximum of 49 g of water vapour.


Write scientific reason.

The bottom of some steel utensils used for cooking is copper.


For the same mass of ice and ice-cold water, why does ice produce more cooling than ice-cold water?


600 g of copper at 50°C is mixed with lOOOg water at 20°C. Find the final temperature of the mixture. The specific heat capacity of copper is 0.4 Jg-1°C-1 and that of water is 4.2 Jg-1°C-1


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×