Introduction to Heat Transfer: How Does Heat Transfer? You can specify conditions of storing and accessing cookies in your browser. What is the specific latent heat of fusion of ice if it takes 863 kJ to convert 4.6 kg of ice into water at 0 C? How is a chemical change different from a physical change? approximately = 397 In three significant figures, Answer : The specific latent heat of fusion of ice is, 187.608 J/g, m = mass of the substance = 4.6 Kg = 4600 g. Now put all the given values in the above formula, we get the specific latent heat of fusion of ice. Question 6 What is the value of latent heat of vaporisation of water ? Latent heat is of two types: Take some water in a beaker and suspend a thermometer in it.We heat this water by using a small burner and note its temperature after every minute.As heat is given,the temperature of water rises gradually until 100 is reached.At the temperature of 100 water boils and start changing into steam.As more heat is given to water,more steam is formed but the thermometer reading remains at 100 showing that there is no rise in temperature during the boiling water.Thus,once the water begun to boil,the temperature remains constant at 100 until all the water has changed into steam.The heat which is going into boiling water but not increasing its temperature is the energy required to change the state of water from liquid to gas. seafloor spreading The latent heat of fusion of a substance is. Please answer the following essay question with 5-7 sentences. We take some crushed ice in a beaker and suspend a thermometer in it.We note the temperature of ice.It is found to be 0.We now heat the ice gently by using a small flame of a burner.On heating,ice starts melting to form water.We keep on recording the temperature of melting ice on the thermometer every minute.As more heat is given,more ice melts to form water but the thermometer reading remains 0.As long as there remains even a little of ice in the beaker,the thermometer does not rise,it remains constant at 0.This shows that there is no rise in temperature during the melting of ice.It is only when all the ice has melted that the temperature of water starts rising on further heating.The heat which is going into ice but not increasing its temperature,is the energy required to change the state of ice from solid to liquid. We take some crushed ice in a beaker and suspend a thermometer in it.We note the temperature of ice.It is found to be 0.We now heat the ice gently by using a small flame of a burner.On heating,ice starts melting to form water.We keep on recording the temperature of melting ice on the thermometer every minute.As more heat is given,more ice melts to form water but the thermometer reading remains 0.As long as there remains even a little of ice in the beaker,the thermometer does not rise,it remains constant at 0.This shows that there is no rise in temperature during the melting of ice.It is only when all the ice has melted that the temperature of water starts rising on further heating.The heat which is going into ice but not increasing its temperature,is the energy required to change the state of ice from solid to liquid. Both latent and sensible heat cause air to move, producing wind and vertical motion of air masses. It is the quantity of heat in joules required to convert 1 kg of liquid to vapour or gas,without any change in temperature. yes very helpful for upcoming examinations. This amount of heat is absorbed by each gram of ice in melting or is given up by each gram of water in freezing. question 4 Why does the temperature remain constant during the melting of ice even though heat is supplied continuously ? This is fantastic Madam. Ice has strong inter particle forces of attraction.The heat which we supply to ice during melting is used up to overcome the forces of attraction so that they become somewhat loose.This heat does increases kinetic energy of particles and hence no rise in temperature take place.But when all the ice has melted to form water,further heating increases the kinetic energy of particles due to which the temperature increases. Particles of water attract each other.The heat energy which we supply during boiling is used to overcome forces of attraction between water particles so that they become totally free and change into a gas.this latent heat does not increase the kinetic energy and hence no rise in temperature take place. Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. This is a table of specific latent heat (SLH) of fusion and vaporization for common materials. mountains She has started this educational website with the mindset of spreading Free Education to everyone. PLEASE FILL IN THE BLANK!!!!! Last Updated on May 3, 2020 By Mrs Shilpi Nagpal 3 Comments. Daily life is filled with examples of latent and sensible heat: Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. Filed Under: Class 9, Matter in our surrounding Tagged With: latent heat, latent heat of fusion, latent heat of vaporisation. ocean formation She has taught science courses at the high school, college, and graduate levels. Its value does not depend on sample size or where within a substance the sample is taken. Therefore, the specific latent heat of fusion of ice is, 187.608 J/g, This site is using cookies under cookie policy. 1)Latent Heat of Fusion PLZ HURRY, A ____________ is a large body that moves around a star? Sensible heat is released when soil absorbs energy from sunlight and gets warmer. Required fields are marked *, Latent heat | Matter in our Surroundings | Class 9, The heat energy which has to be supplied to change the state of a substance is called. is Answer : The specific latent heat of fusion of ice is, 187.608 J/g. We take some crushed ice in a beaker and suspend a thermometer in it.We note the temperature of ice.It is found to be 0.We now heat the ice gently by using a small flame of a burner.On heating,ice starts melting to form water.We keep on recording the temperature of melting ice on the thermometer every minute.As more heat is given,more ice … Similarly, considerable energy must be absorbed to convert liquid water to ice in a freezer. Water has a high latent heat of fusion, so turning water into ice requires the removal of more energy than freezing liquid oxygen into solid oxygen, per unit gram. 2)Latent Heat of Vaporisation. The specific latent heat is different for solid to liquid transition and liquid to gas transition. How are you guys doing?. When latent heat is absorbed or released, it produces instability in the atmosphere, potentially producing severe weather. C) donate protons to solution The latent heat of vaporization of water is more than latent heat of fusion of ice, because : A. on vaporization much larger increase in volume takes place. Boiling water on a stove occurs when thermal energy from the heating element is transferred to the pot and in turn to the water. Question 7 What is the value of latent heat of fusion of ice ? Latent heat of Vaporisation Calculate the latent heat of fusion L for each of the three trials you performed. There's no science section sorry, BOTH acids and bases Question 2 Define the term Latent heat of fusion of a solid ? The most common units of specific latent heat are joules per gram (J/g) and kilojoules per kilogram (kJ/kg). Heat is dissipated away from the body due to the high latent heat of vaporization of water.
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