atalie DiStefano
The Concept of Heat
The natural sciences span over a wide range of phenomena, from the theory of gravity acting on the earth, to specific functions within the cell. These two examples provide a general idea of the enormous extent of the natural sciences. Scientists have been allowed to research these phenomena due to underlying connections between subtopics.
In physics one can view many underlying connections between different subtopics. For example; in thermodynamics. Thermodynamics is a branch of physical science that deals with the relations between heat and other forms of energy such as mechanical, electrical or chemical energy. More importantly, heat itself and its relation to energy and work done on a system. Many
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One theory of heat is that the laws of physics only allow the energy transfer from hot temperatures to cold temperatures. This is displayed in the calorimeter experiment. A calorimeter is an apparatus used to measure the specific heat of several materials, it is designed so little heat is lost or gained to the surroundings. Imagine a copper ball that is heated in boiling water and dropped into a calorimeter that contains water at room temperature. The substances have entirely different initial temperatures. What will happen? The heat from the copper ball with distribute within the water causing them to begin to equalize in temperature. This is because the summation of all heat energy in a closed system is equal to zero therefore, the same amount of energy moves between the two systems during a thermal interaction causing them to be the same temperature. This displays thermal equilibrium in work. A system is said to be in thermal equilibrium if its state variables are constant and not changing. Therefore, when the hot copper ball is dropped in the room temperature water the temperatures of both interacting systems will become equal to each other in temperature if the molecules have enough time to interact. Thermal equilibrium is proven to be true when objects transfer heat. This is because the interacting molecules strive to have
2. Conduction heat loss by direct molecule to molecule transfer from one surface to another. (skin loses heat through direct contact with cooler air, water, or other surfaces)
The law of thermodynamics in can predict the direction of chemical reactions and changes in substances
* We use scientific theories to understand events beyond what our imaginations can often handle, ie; Newton’s theories on attraction of masses.
There are four basic components for thermal energy (heat): 1. All matter is made up of tiny particles called atoms. These can only be seen with special microscopes. 2. The atoms are always moving – they all have kinetic energy. 3. The particles have space between them. Different states of matter have different amounts of space. 4. Adding heat (energy) to matter makes the particles move more quickly. Since faster moving things have more kinetic energy, adding heat increases the energy of the particle. 5. Cooling it down decreases the amount of kinetic energy and slows the movement down.
It is stated that all chemical reactions involve energy changes. Where a substance is stored with chemical energy and has the potential to be converted to heat (insert cited thing). Exothermic and Endothermic reactions are included in the changes in heat of energy. As Exothermic reactions release heat, and transfer the temperature to its surroundings. This is because the energy absorbed to split the bonds of the reactants release less heat energy than the product made by the bonds. An endothermic reaction however absorbs heat from its surrounding as the reactant doesn’t supply enough energy therefore it absorbs energy from its environment. In addition, endothermic reactions release more heat energy in order to break the bonds made by the products.
Science thrives on seeking to provide a framework of understanding for the natural and physical world of matter. This endeavor involves taking an ever curious approach towards the observable world and constantly seeks to unravel more of the scientific knowledge of this world. The field is often concerned about mechanisms and processes that drive the natural phenomena we observe. Scientific methods often involve the formation of hypothesis from observation of matter, development of experiments to tests hypotheses, formation of theories and models from conclusions of experiments, and further refinement of theories to fit other data or new observations. Science often seeks to generate laws underlying the occurrences in nature, be it the laws of thermodynamics or the Newtonian laws of motion. Symbols, notations and mathematical equations are often used to provide this scientific lens of understanding this world. Knowledge gained from scientific endeavor is used to benefit humanity, in the curing of diseases and technological machinery.
The acquisition of new knowledge cannot come without imagination. The world around us is vivid, and to be able to understand what is out there, a scientist must imagine what they want to observe. To answer the mystery of these concepts, the sciences were placed into hierarchies, that sparked new ways of thinking to answer the events of evolution: the appearance of life and the development of thought and language. The events can begin to be discussed by the hierarchical complexity of the events. The more simpler events pave the way into thinking for the complex events. When considering the integration in systems, the constraints and limitations occur with the complex the system becomes. As more properties arise in a system, equal amounts of restraints come with it. A consequence
The addition or removal of energy can affect an equilibrium by decreasing the rates of reaction. It can be seen as temperature changes a substances phase of matter, it also affects the probability of collision. Both of these changes can be put into terms of changing how much space these chemically-compatible particles take over time. And as you would concentrate a system over a smaller volume, it can be seen temperature and the context of the particles decrease the space of colliding probability, therefore increasing its likelihood. In terms of heat, the equation expressed for equilibrium may not show how the amount of energy could affect the rate of change in concentrations. The heat given by or taken from the surrounding system should be treated as a constituent of one side of the reaction. Whether it is an exothermic or endothermic reaction, the equilibrium will attempt to bring back the system to normalcy. Given which type of reaction though, you can predict which side will be favored when the equilibrium reestablishes itself. Adding heat will favor the opposite side in an exothermic reaction. Subtracting heat though, will favor the product side as the system will try to restore the original consistent amount of heat there
The law of conservation of energy states that the total amount of energy in a closed off system remains the same. Using previous scientists work, I assumed a relationship between heat, magnetism, mechanics, electricity, and light by treating them all as forms of energy. I published my theories in my book "On the Conservation of Force".
A demonstrate is that when two objects of the same material are put together , the object with the higher temperature cools while the cooler object becomes warmer
This means that, if the substance and the chemicals inhabiting the substance deal with a certain change in their environment, they react in ways to try and either fight off that change or adjust to the change so that there is a balance in the new setting. For example, the solubility of CO2 is greater in cold water vs. hot water. This is because when the temperature rises above the level CO2 is already capable of dissolving from the body of water, the heat reaction causes the solubility ability of CO2 to decrease making the reaction exothermic. Now if the temperature is lower than the average level of heat that can cause the CO2 to separate from the liquid substance, than the solubility increases and the reaction becomes endothermic since
Temperature is a measure of the average kinetic energy of the particles in a body. Temperature can be understood by recognizing that a hot object contains more thermal energy than a cold object. The amount of thermal energy in a substance is affected by the amount of particles that are in it. Temperature is independent of number of particles in
When heat is added to a substance, the kinetic energy of individual particles increases, which makes them move faster resulting in a increase in temperature. The more heat that is added per gram of substance, the greater the temperature change. The relationship between the heat added, the mass of a substance, and the temperature change it undergoes is known as the specific heat.
The problem that needs to be solved is whether light colored or dark colored clothing is more comfortable to wear on a hot, sunny day.
This book, ‘What is this Thing called Science?’ is assigned to write a review on the third edition which was published in the year 1999, 1st February by University of Queensland Press. This book is reflects up to date with day today’s contemporary trend and gives a basic introduction on the philosophy of science. This is a very comprehensive book explaining the nature of science and its historical development. It is very informative and a necessary reference when attempting to understand the how science has evolved throughout time. The book is also well organized, and each chapter is concluded with suggestions for further reading. This book is actually a review on the philosophy of science.