The amount of water and its temperature will be measured before adding some ice and then again after the ice has been melted. By knowing the masses of the ice, the water, and the calorimeter, and the resulting temperature change after the ice melts, the latent heat of fusion of ice is found. You will then determine the molar heat of fusion for ice in kjmol. On the latent heat of fusion of ice the journal of physical. Experiment 3 the latent heat of fusion of ice a small amount of ice is placed in a calorimeter containing water. Note that the temperature does not actually change when matter changes state, so its not in the equation or needed for the calculation. As ice melts or liquid water evaporates, the molecules change state from a solid to. The energy that needs to be supplied to a substance in order to complete the transition from the solid to liquid phase is called the latent heat of fusion. Measure about 350 ml of hot tap water into a 400ml beaker.
Aug 10, 2011 we did an experiment on how to find latent heat of fusion of ice. This wikibook should provide professional knowledge base for fusion scientists in definitiontheoremproof scheme. Physics 201202 and 207208 are introductory calculusbased physics courses which introduce the undergraduate student to a broad spectrum of fundamental physical laws spanning from mechanics to heat and thermodynamics to electricity and magnetism to waves and light. We are trying to determine the heat of fusion for ice and compare it to the accepted value. If the tap water is sufficiently hot, this step is not necessary. The physics hypertextbook 19982020 glenn elert author, illustrator, webmaster. Heat from the air transfers to the ice causing it to melt. Ice will be placed directly into a measured amount of water.
The ice we encounter in everyday life is known as icei in the bridgman nomenclature. Ice is one of the most abundant and environmentally important materials on earth, and its unique and intriguing physical properties present fascinating areas of study for a wide variety of researchers. The energy required to melt the ice is removed from the warm water as it. Whether youre a firsttimer or a tripleaxle pro, youve probably wondered whats going on. The latent heat of fusion refers to the phase change between states of solid and liquid. The content of latent heat is complex in the case of sea ice because it is possible for sea ice and brine to exist together at any temperature and melt at a temperature other than 0 o c when bathed in a concentrated salt solution, just like. Download complete pdf book, the epub book or the kindle book. Stay tuned with byjus to learn more about physicsrelated formulas. Brings together research from physicists, chemists, glaciologists, meteorologists, geophysicists, and molecular biologists. The idea is that, by creating nuclear fusion at room temperature, researchers can generate a nearly unlimited source of. Calorimeter of mass mc and specific heat capacity cc and initial warm. Latent heat energy must be removed from substance example how much heat is released from 50g of water as it a changes from liquid to ice at 0oc. Nuclear fusion physics and technology wikibooks, open books.
Petrenko, hb8000, dartmouth college, hanover, nh 03755, usa telephone. In order to calculate the heat of fusion of ice from 3, it is necessary to first. A total of 334 j of energy are required to melt 1 g of ice at 0c, which is called the latent heat of melting. In this experiment the temperature of the ice is constant and remains so until all. First comprehensive account of the physics and chemistry of ice. Heat gained ice mice x hfusion hfusion heat gained ice row 11 mice row 5 enter in row 12 7. Assume that the energy lost by the warm water is gained by the ice, but notice that the energy is used. Physics lab experiment to measure the specific latent enthalpy. The ice we encounter in everyday life is known as ice i in the bridgman nomenclature. Energy is required to melt a solid because the cohesive bonds between.
This section will be revised shortly to reflect more recent data pointed out by mark thorson. It starts with an introduction to the case for the development of fusion as an energy source. Basically, we had 40 degrees of water in a copper calorimeter put into a styrofoam insulator and kept adding ice into the water until the water reached 5 degrees. The amount of heat required to convert one unit amount of substance from the solid phase to the liquid phase leaving the temperature of the system unaltered is known as the latent. Ice, and particularly snow, has a high albedo, a ecting the radiative budget of the earths surface. Hobbs did his doctoral work at imperial college london, before moving to the university of washington in 1963, where he founded and directed the cloud and aerosol research group, and became a leading researcher in atmospheric physics, pioneering techniques of airborne cloud sampling. You do not need a full lab report, just answer the analysis questions and attach the lab handout. The physics of ice covers the state of knowledge regarding the structure, properties, occurrence, and movement of ice. The final equilibrium temperature after all the ice has melted is 12. This book is composed of eight chapters, and begins with an introduction and in the fundamental aspects of ice, including pure water freezing, circulation, occurrence, classification, and importance of ice. View lab report physics lab 49 latent heat of fusion of ice from physics physics at don bosco prep high school. Ice of mass m and specific latent heat l at its melting point t0 into a.
Heat capacity, specific heat, and heat of transformation book. Heat lost by water is equal to the mass times the specific latent heat of fusion and the equation is vtiml, m is mass of water in difference, t stands for the time taken for heat the ice and l is the latent heat of fusion of ice. The idea is that, by creating nuclear fusion at room temperature, researchers can generate a nearly unlimited source of power that uses. Experiment 4heat of fusion and melting ice experiment. Heat of fusion of ice continued 2 21 finn cientific inc ihts esere procedure 1. Old ice sea ice that has survived at least one summers melt.
Heat of fusion of ice lab 1 the heat of fusion of ice. Mix 10 grams of room temperature water with 10 grams of room temperature water. In his book mountains of tartary, shipton noted that at higher camps on the. This physics video tutorial explains how to solve problems associated with the latent heat of fusion of ice and the latent heat of vaporization of ice. Object of the experiment energy is required to change water from a solid to a liquid, i. The amount of heat gained by a solid object to convert it into a liquid without any further increase in the temperature is known as latent heat of fusion. The sun, 10 7 k core, hydrogen fuses to form helium through a process known as the protonproton chain often shortened to the pp chain. Use equation 2 and the data in the data section to solve for the latent heat of fusion lf. Chemistry heat of fusion of ice jiskha homework help. Apr 26, 2009 homework statement determine the specific latent heat of fusion of ice given the amount of time it takes the ice to melt 150 seconds.
Additional phases, called ice ii through ice ix, have been. Osborne abstract the results of measurements of the heat of fusion of ice made at the national bureau of standards and published in 19 and 1915 have been revised by one of the original experimenters, usng more recent data for the heat capacity of water, which is involved in the calculations. Compare your experimental result to the accepted value of 333. The mass of ice melted is the same as the increase in the volume of the water. Calculate the heat of fusion of ice in kjmol by dividing the heat transferred from the water by the moles of the ice melted. Calculate the latent heat of fusion l for each of the three trials you performed.
Theory when heat is added to a substance, a temperature change is generally observed to occur. A small amount of ice is placed in a calorimeter containing water. The reduction of sea ice in a warming climate is one of the important positive feedbacks in the climate system. May 27, 2008 to many people, cold fusion sounds too good to be true. Warm water allows ice to melt quickly and allows more ice to be used, which improves accuracy.
Except for melting helium, heat of fusion is always a positive value. In the heat of fusion lab topics relating to the study of thermodynamics will be explored. Nuclear fusion physics and technology deals with nuclear fusion in tokamaks. Pdf melting ice and boiling water in the mountains. Please practice handwashing and social distancing, and check out our resources for adapting to these times. This plasma devices may generate clean energy one day, thus heavy research is under way. While the albedo of the open ocean is about 7%, a thin fresh snow cover on sea ice can increase this to more than 87%. Find the latent heat of fusion, lf, according to lf q.
Nuclear fusion physics and technology wikibooks, open. Heat of fusion 516 laying the foundation in physics 19 heat of fusion determining the heat of fusion of ice the heat of fusion is the quantity of heat needed to change one kilogram of a substance from the solid state to the liquid state at the normal melting point of the substance. Informed by research from physicists, chemists, glaciologists, meteorologists, geophysicists, and molecular biologists, the book places emphasis on the basic physical properties of ice electrical, optical, mechanical, and thermal, the modes of nucleation and growth of ice, and the interpretation of these phenomena in terms of molecular structure. State examination commission physics higher level, 2014. This book is about the physics of ice, by which is meant the properties of the material itself and the ways in which these properties are interpreted in terms of water molecules and crystalline. If a solid and liquid are both present the heat added will not change the temperature.
Latent heat of fusion formula definition, equations and. In this experiment you will try to measure the latent heat of fusion of ice lhice, the energy needed per gram to melt ice. Purpose to determine the molar heat of fusion of ice. To many people, cold fusion sounds too good to be true. Pdf large circular ice blocks up to 80 m of diameter have been observed on frozen river around the world. The heat gained by the ice depends on the mass of ice multiplied by hfusion. Physicist claims first real demonstration of cold fusion. Realizing that the heat lost by the hot water was used to melt the ice, calculate the heat of fusion of ice in joules per gram. After this the applicability of the theory is discussed in the context of gases.
Latent heat of fusion formula definition, equations and examples. By measuring the temperature change of the water, students can calculate the quantity of heat exchanged between the water and the ice. It is important for chemists to be able to measure these changes in heat. When heat flows into a system there are a number of things that can happen. Using these experimental data, students will calculate the heat of fusion of ice.
Sources of error reducing the errors heat lossgain from calorimeter use warm water 10 degrees above room temp. Heat and temperature arvindguptatoys books gallery. Assume there is no transfer of heat to or from the surroundings. As you know, matter exists in three states or maybe four, the fourth being a plasma, solid, liquid and gaseous. Convert the heat of fusion of ice from joules per gram to kilojoules per mole.
Manufacturer of reference books physics reference books physics, reference books physics, how to study physics offered by choice international, new delhi, delhi. Excess ice will be added to warm water, at a known temperature, in a styrofoam cup calorimeter. Background the amount of energy required to convert a solid to. The needed energy will come from a cup of warm water. Most topographic features are smoother than on firstyear ice. It provides an introduction to nuclear fusion and its status and prospects, and features specialized chapters written by leaders in the field, presenting the main research and development concepts in fusion physics.
The heat of fusion of ice rev2016 department of physics. The emphasis is on activitybased learning wherever possible. Hobbs oxford classic texts in the physical sciences. The physics of ice the most recent text on ice physics i could find at the library was written in 1974. On the latent heat of fusion of ice the journal of. Homework equations q ml the attempt at a solution time 530w. We did an experiment on how to find latent heat of fusion of ice. Electrical energy formula decimal to fraction formula wave. It is useful for some students to see a graph of the experiment, and one representation is given below. Here, heat actually refers to the transfer of heat energy between the objects. Experiment 1 to determine the specific latent heat of fusion of ice.
The purpose of these pages is to explore the physics of ice skating in a fun, approachable way. Thus, the latent heat of fusion encompasses the process of adding heat to melt some solid. Latent heat of fusion and vaporization, specific heat. Ice can be added until the temperature is ten degrees below room temp. The heat required to melt the ice will be supplied by the water. Pdf rotation of a melting ice at the surface of a pool researchgate. He received a number of awards for his work, including fellow of the american meteorological society. This value is called the molar heat of fusion of ice.
684 252 1081 95 355 939 252 613 794 1063 345 1168 616 310 704 261 1126 1587 999 846 1273 1417 560 1200 164 372 1214 1359 320 870 1486 1020 1353 463